-- Do you still remember when we went to the Summer Palace?
--- I can’t remember it well, but it _____ sometime last July.
| A．must have been | B．might be |
| C．could be | D．might have been |
His success in his career was due to his determination __________ what seemed impossible.
| A．of doing | B．with doing | C．doing | D．to do |
You can get the best result ________ you carry out the experiment under the desired conditions.
| A．what if | B．even if | C．only if | D．as if |
---You’ve finished off two pizzas!
---Yes. But the second is ___________ little bit small, so may I have __________ third one?
| A．a; the | B．不填; a | C．不填; the | D．a; a |
The officer insisted the young girl______a thief and ordered she______free.
| A．was not；be set | B．should not be；be set |
| C．was not；was to be set | D．was not；set |
I have to see the doctor because I a lot lately.
| A．have been coughing | B．had coughed | C．coughed | D．cough |