—Keep ___ in mind that you have to be here on time.
—OK, I will.
| A．it |
| B．me |
| C．this |
| D．one |
I hate ______ when people call me by my nickname
(绰号).
| A．that | B．one | C．it | D．不填 |
Can you see that building ______ by trees? That’s ______ we study.
| A．surrounded; which | B．surrounding; where |
| C．to be surrounded; in which | D．surrounded; where |
Sir, you ________ take this seat. It’s just for the old.
| A．oughtn’t to | B．can’t | C．won’t | D．needn’t |
______ life began on earth is one of the biggest puzzles that scientist found hard ______.
| A．How; solving | B．When; to be solved |
| C．How; to solve | D．Which; to solve |
Was it because his mother was ill ______ he didn’t go to school?
| A．so | B．that | C．why | D．when |