-Why does the water smell terrible?
-Because large quantities of water __________.
| A．is being polluted | B．have been polluted |
| C．is polluted | D．has been polluted |
The next morning people found the outside world completely ___.
| A．change | B．changed | C．changing | D．having changed |
Hearing mother’s step, the children pretended ___.
| A．to sleep | B．to be sleeping | C．sleeping | D．being sleeping |
__ made her parents very angry.
Jane’s engaging Black B. Jane’s being engaged to Black
C. Jane having engaged to Black D. Jane has engaged to Black
They suggested __ the sports meet till next Tuesday.
| A．us to put off | B．our putting off | C．us of putting off | D．our put off |
You must get her __ here this evening.
| A．come over | B．to come over | C．coming over | D．came over |