I got into trouble again. Only then ________ that I should have followed my parents’ advice.
| A．I realized | B．did I realize | C．realized I | D．had I realized |
He had no sooner finished his speech the students started cheering.
| A．since | B．as | C．when | D．than |
I'll go to the library as soon as I finish what I
| A．was doing | B．am doing |
| C．have done | D．had been doing |
Would you like tea or coffee?
-, thank you. I've just had some water.
| A． | Either | B． | Both | C． | Any | D． | Neither |
The exam results will be on Friday afternoon.
| A．put down | B．put off | C．put up | D．put away |
No matter how, it is not necessarily lifeless.
| A．a desert may be dry | B．dry a desert may be |
| C．may a desert be dry | D．dry may a desert be |