As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work.
| A．不填；不填 | B．不填; a | C．the ; a | D．the; the |
—What on earth makes you apply for the position as a guide?
—This is the job that I .
| A．looked for | B．had looked for |
| C．will look for | D．have been looking for |
The students entered the classroom，smiling and________，and ______ down to have their lessons.
| A．talked；sat | B．talking；sitting |
| C．talking；sat | D．talked；sitting |
He kept a little notebook, in which the names and addresses of his friends.
| A．wrote | B．was writing |
| C．were written | D．was written |
that her mother would come back soon, the girl calmed down.
| A．Having convinced | B．Being convinced |
| C．Convincing | D．Convinced |
—Why? Tom,your skirt is so dirty!
—Mum, I my storeroom downstairs.
| A．cleaned | B．have cleaned |
| C．was cleaning | D．have been cleaning |