act + adjective = the adjective is the object of the acting, i.e. what the actor pretends to be he acts dumb, he acts tough, he acts confident (usually followed by 'but...') act + adverb = the adverb describes the acting itself, e.g. he acts well, he acts beautifully. in theory you could use both, e.g. he acts dumb well, i.e. he is good at pretending to be dumb. It gets confusing when 'act' has the meaning 'behave', e g. he acts with integrity, he acts like a clown. But if we stick with 'act' in the sense of 'pretend', the above description should be adequate!

It's 100% intelligible, but we can make it sound a little more professional: 'You must' isn't usually used for demands or requests. a more appropriate version would be 'we need you to...' the comma between 'ship' and 'we' doesn't really show the relationship between the two sentences; you could replace it with 'as', or a semicolon. 'We have been requesting them since December' - excellent use of the past perfect continuous! 'please inform us how long it will take to make them': 'it takes' means 'how long it usually takes'. In this case I assume you want to know specifically how long it will take to make them on this occasion - presumably it will be quicker than usual as they have an angry customer (you), so we can use 'will' to specify that you mean on this single occasion,not the 'usual' length of time. it might be better to use manufacture instead of make, just to sound more professional. Also, check your capital letters! US is a country, us or Us is a pronoun. hope that helps!

Just to give the grammatical explanation: 'bring' is an action verb, so in the present simple (brings), it means a repeated, regular action. That's not what we want. That's why it needs to be changed to 'will bring'. 'have in store' and 'hold' are state verbs (well, hold can be either, but in this sentence it would be a state verb) so it's fine to use the present simple, as it means continuity or long-termness, which is what we want. As has been mentioned, 'have sth. in store (for sbd.)' is the VP most commonly used with 'life' for this meaning, but it's meaning might not be clear to all speakers, so 'will bring (us)' might be more appropriate, depending on your audience.

X-ray is countable! so you need an article with it in the singular. Do I need an x-ray, Doctor? also, it's not necessary to add 'doctor' at the end. The doctor knows from the question and the context that you're speaking to her!

basically it's the most annoying, confusing and inconsistent thing ever and you have to just keep getting it wrong all the time until you get so angry that it stays in your head. anything that could potentially go over 50, or is a value or measurement, will almost always be in sino. e.g. money, the minutes in the time, centimetres/kilogrammes/watts etc. anything that is unlikely to go above 50 and is cumulative counting will probably be in Korean (e.g. age, hours in the time, how many apples you want) stupid exceptions: numbers of months and years 4년 후 4 years later is in sino 4개 월 후 4 months later, inexplicably with 개 even though 개 always goes with Korean numbers 2틀 , 2 days, is in sino 3일 4일 5일 etc are in sino 10흘, ten days, is in Korean (but could also be 10일 in sino if you prefer) 4배 크다 4 times bigger is in Korean 4번 4 times is in Korean 4번째 the fourth one is in Korean 4번 방 room number 4 is in sino 104호 house number 104 is in sino I'm not providing these as helpful explanations, just as examples of how ridiculous it is!

absolutely not haha, the verb 'bathe' can mean both, but 'take a bath' can only mean 'wash yourself'. It could possibly work to say 'take a bath!' as a joke when throwing somebody into the sea. But as a suggestion or command, it can only mean 'you smell, please wash yourself'

the context usually makes the difference clear, e.g. 아침 먹었어? / 아침에 보자 if you need to explicitly make it clear or speak formally you can say 아침 식사, e.g. 아침 식사 공급됩니다

my Korean book taught me that when you have a compund 받침, the weaker sound (ㄹ or ㅅ) isn't pronounced unless there's a following character starting with ㅇ 밟다 = 밥다 밟아 = 발바 핥다 = 핫다 핥아 = 할타 값 = 갑 없다 = 업다 값이 = 갑시 없어 = 업서 however, in reality this doesn't seem to be the case when ㄹ is involved, and the ㄹ is usually pronounced in all circumstances. I dunno if this is a disconnection between theory and reality, but I think my Korean book and that exercise you're showing us are wrong. These are just my observations btw, see what others say!