If his parents are convinced ____the fact that his son always focuses his mind his study.
| A．of; on | B．of; at | C．by; to | D．on; at |
When _____ about the secret of his success, Steven gave us a smile and said nothing .
| A．asking | B．having asked | C．ask | D．asked |
—Oh, it’s you! I _____ you.
—I’ve just had my hair cut, and I'm wearing new glasses.
| A．didn’t recognize | B．hadn’t recognized |
| C．haven’t recognized | D．don’t recognize |
To their great joy, the day they looked forward to _______at last.
| A．coming | B．had come | C．come | D．came |
The question _____ at tomorrow’s meeting is of great importance.
| A．to discuss | B．being discussed | C．to be discussed | D．discussed |
is known to us all, Germany is ______ European country.
| A．It; an | B．As: a | C．It; a | D．As; an |