According to a recent U.S. report, children spent up to 25 hours a week _______ TV.
| A．watching | B．to watching | C．to watch | D．watch |
Our decision _____ was wise .
| A．of waiting | B．to wait | C．for waiting | D．to be waiting |
I couldn't have got to the meeting on time - _______ an earlier train .
| A．if I had not caught | B．unless I had caught | C．if I did not catch | D．unless I caught |
I'd better not catch ______ that again !
| A．your doing | B．you doing | C．you to do | D．you being doing |
I posted the letter some time _____ the week .
| A．in | B．during | C．throughout | D．within |
Take a taxi , _____ you'll miss your train .
| A．and | B．if | C．otherwise | D．or |