Are the sentences correct? 1) The real strength of the film is its witty to dialogue 2) I need to get someone to shorten my new jeans 3) The pole -vaulter Sergei Bubka was the first man to clear the height of six metres 4) The custard will thicken as it cools 5) I can't express the depth of my feelings for you 6) The team has been weakened by the injury to its top player 7) Can you measure the width of the window? 8) The school has decided to enlarge the holidays by three days ( long)