When I try to find ______that prevent so many people from taking part in the program, it seems to me that there are two main causes.
| A．why it does | B．what it does | C．what it is | D．why it is |
—— Look at the black clouds.It ＿＿＿＿＿＿ soon.
—— Sure.If only we ＿＿＿＿＿out.
| A．is raining； didn’ t come | B．is to rain； won’ t start |
| C．will rain； haven’ t started | D．is going to rain； hadn’ t come |
I should very much like to have gone to that party of theirs, but ＿＿＿＿＿.
| A．I’m not invited | B．I was not invited |
| C．I have not been invited | D．I had not been invited |
—— What were you up to when your parents came in?
—— I＿＿＿＿＿for a while and＿＿＿＿＿some reading.
| A．was playing； was going to do | B．played； did |
| C．had played； was going to do | D．had played； did |
—— ＿＿＿＿you ＿＿＿＿ the editor at the airport?
—— No, he ＿＿＿＿ away before my arrival.
| A．Have...met； has driven | B．Had...met； was driven |
| C．Did...meet； had been driven | D．Have...met； had driven |
—— You haven’t said a word about my new coat,Brenda.Do you like it?
—— I’ m sorry I ＿＿＿＿＿＿ anything about it sooner.I certainly think it’ s pretty on you.
| A．wasn’t saying | B．don’t say | C．won’t say | D．didn’t say |