It is reported that very little use of these waste materials_______ in the past decades．
A．was taken B．was made
C．has been made D．has been taken
----What terrible weather! I really don't agree with it!
----- ____________ ．
A．Me too B．It doesn't agree
C．I can't agree more D．Nor do I
______the bones under the sand，the scientists concluded that they came from the dinosaurs about 65 million years ago．
A．Being inspected B．Inspected
C．Having inspected D．To inspect
She is a quiet girl at school，but sometimes she _____be very naughty．
A．should B．would C．can D．will
Shy people often avoid situations _____would force them into close contact with other people．
A．where B．which C．when D．what
-----How long do you think it will be _____man can finally solve the problem of cancer?
------Well．it depends．
A．when B．until C．after D．before
