Asked suddenly about the matter ,he couldn’t an answer at once.
| A．come up with | B．look for | C．put up with | D．answer for |
In order to help the police ，the witness described what he had seen very carefully not to ______ any detail.
| A．act out | B．leave out | C．pick out | D．put out |
One of the glorious moments in my school life was I was awarded the Mayor’s Award．
| A．why | B．how | C．that | D．when |
We saw ____ audience clapping their hands when ______ popular singer appeared on the stage．
| A．the; the | B．the; 不填 | C．an; a | D．不填; the |
After a long absence, I went back to college, ______ to pick up where I'd left off．
| A．hoping | B．hope | C．to hope | D．hoped |
No matter how ______，scientists are eager to know more about it by exploring.
| A．an ocean may be deep | B．deep may an ocean be |
| C．deep an ocean may be | D．may an ocean be deep |