— Could you meet me at the airport?
— I'd like to，but I'm afraid I ______ a very important meeting when you return.
| A．am attending |
| B．was attending |
| C．will be attending |
| D．will have attended |
.
The discovery of new evidence lead to ________.
A the thief having caught B catching the thief
C the thief being caught D the thief to be caught
.
The Internet __________ of great value to us during our project.
A was proved B proved C was proving D was being proved
.
Don't ________ the drug on animals.
A try out B watch out C make out D take out
.
Books are the most important records we keep ________ man's thoughts, ideas and feelings.
A up B of C forD /
.
The young dancers looked so charming in their beautiful clothes that we took ___ pictures of them.
A a large quantity B a great many of C a large amount of D masses of