shockingly incorrect English! What are they teaching you guys? I'm not sure what they are referring to with regards to listing speakers A and B and the function? However to me the first one are two friends who meet in a restaurant one of them has never been to before. The second one is could be a couple living together and one of them sees energy saving light bulbs online and mentions them to the other person. The second sentence should read "I think we need them badly" or "I think we are in dire need of them".

2A should be 'These light bulbs ....

If this is an English test that you have got from somewhere, you should know that the information provided for the second question is badly (and wrongly) written. Part B of the second question should say "That's interesting, I think we are badly in need of it."