单选题：________struck me________I would have an important meeting i..

He asked us ________ we saw the lost cat or not.A. thatB. whatC. which D. whether

— When shall we go to have a picnic?— Not________the weather begins to pick up. [ ]A. sinceB. untilC. unlessD. while

— Can you join us in the party this evening?— Well, that depends on________I can have my report done before then. [ ]A. whetherB. whereC. whenD. how

Paul had to write a history paper, ______ he couldn't find time to do it. [ ]A. but B. so C. became D. if

What an unforgettable experience!I'll write it down________it is still fresh in my memory. [ ]A. sinceB. whileC. afterD. until