The field research will take Joan and Paul about five months; it will be a long time ________ we meet them again．

A．after

B．before

C．since

D．when

You can’t enter that room, because it ________．

A．has been painted

B．will be painted

C．is painted

D．is being painted

－People should spare no effort to protect the environment．

－________, air pollution, as is known to all, does harm to our health．

A．All right

B．Fine

C．Go ahead

D．Exactly

I wish I ________ a chance to talk with you about my writing before you left．

A．have

B．had

C．had had

D．will have

Some parents can’t ________ their children, which often sets off the conflicts of feelings between two generations．

A．relate to

B．find out

C．turn to

D．take in

At no time before I attended the meeting ________ that I would have to make a speech．

A．I was told

B．was I told

C．I have told

D．have I told

You’ll have to wait for one more week ________ the manager comes back from her trip．

A．after

B．until

C．when

D．before

－What makes you so unhappy?

－________．

A．Because I have put on weight

B．Putting on weight

C．For I have lost some weight

D．Because of my putting on weight

More than three hundred people lost their lives in the train crash, ________ thirty children．

A．included

B．including

C．it included

D．to include

He was familiar ________ the animals．That means these animals were familiar ________ him．

A．to; with

B．with; to

C．to; to

D．with; with