Nothing that he suggested _____ to be of any use.
| A．prove | B．proved | C．proving | D．to prove |
What do the five rings on the Olympic flag ___________?
| A．stand by | B．stand up |
| C．stand out | D．stand for |
Visitors were _______ at the ________pictures that the guide showed.
| A．amazed; amazing | B．amazing; amazing |
| C．amazed ; amazed | D．amazing; amazed |
I can never forget the day ________ we worked together and the day ________ we spent together.
| A．when; which | B．which; when |
| C．what; that | D．on which; when |
Is this the reason _______ he was late for the meeting?
| A．why | B．when | C．where | D．what |
I have many friends, _______some are businessmen..
| A．of them | B．of which |
| C．of whom | D．of that |