________it was ________so many elephants marching along the street.
| A．How great fun; to see |
| B．What a great fun; seeing |
| C．What great fun; to see |
| D．How great a fun; to see. |
Don’t ___________ your dictionary all the time when you meet new words.
| A．work on | B．take on | C．depend on | D．keep on |
It is difficult __________ you ___________ finish the work in a week.
| A．of, to | B．with, to | C．with, for | D．for, to |
I can’t understand ____________ the boy alone.
| A．why did she leave | B．why had she left | C．why she left | D．why she had left |
They asked many questions ___________ had nothing to do with that topic.
| A．which | B．who | C．where | D．when |
_____________ is necessary __________ he trains himself before the Guangzhou Marathon.
| A．This, 不填 | B．The, 不填 | C．It, that | D．This, that |