— Did Jack come back early last night?
— Yes. It was not yet eight o’ clock________ he arrived home.
A. before B. when C. that D. until
The English play ______ my students acted at the New Year’s party was a great success.
A. for which B. at which C. in which D. on which
Unreasonable ________, it turned out to be effective．
| A．though sounded the plan | B．though the plan sounded |
| C．the plan sounded though | D．sounded the plan though |
Due to bad weather we have to put ___ off until next week to go camping in the mountains．
| A．it | B．that | C．one | D．this |
—Do you know how to start the machine?
—________．I’m a green hand．
| A．Not a clue | B．Exactly | C．By all means | D．Just so-so |
We are a team so we must assist one another _____ completing the task．
| A．with | B．to | C．at | D．in |
—Excuse me, Madam．Taking photos is forbidden here out of security．
—I’m really sorry, I _______ of that．
| A．am not informed | B．hasn’t been informed |
| C．hadn’t been informed | D．wasn’t informed |