Teachers should keep students________a distance，but not ________the distance.
| A．at；in | B．in；in |
| C．at；at | D．in；at |
.I don’t mind her criticizing me ,but____is how she does it that I object to .
| A．it | B．that | C．this | D．which |
.We all know that ,___, the situation will get worse.
| A．not if dealt carefully with | B．if not dealt carefully with |
| C．if dealt not carefully with | D．not if carefully dealt with |
.Little _____that we were watching his every move , so he seemed to goin his own way in this business .
| A．he realized | B．he didn’t realize | C．didn’t he realize | D．did he realize |
—Have you ever seen a whale alive? ----Yes,I’ve seen______.
A that B it C such D one
He was unable to make much progress,_________.
A hard as he tried B as hard he tried C hard he was tried D tried hard as he