Mother shut the window ______ she might keep the insects out.
| A．because | B．in order that | C．till | D．as |
Exciting as its special effects are _________, there is too much violence in the film.
| A．to watch | B．to be watched | C．watching | D．being watched |
Lei Lei was only too ready to help others, seldom, _______, refusing them when they turned to him.
| A．if never | B．if not | C．if any | D．if ever |
—Ted found a policeman passing by and handed the mobile phone over to him.
—But he _________ at the place until the owner returned.
| A．must have waited | B．might have waited |
| C．would have waited | D．could have waited |
The books mainly deal with the trouble teens might have _________ right from wrong.
| A．distinguishing | B．distinguished | C．to distinguish | D．to be distinguished |
—Why don’t you buy some cakes while doing shopping yesterday afternoon? —Sorry, ____.
| A．I forget | B．I forgot | C．I have forgotten | D．I had forgotten |