At one point I made up my mind to talk to Uncle Sam. Then I changed my mind,__________ that he could do nothing to help.
| A．to realize |
| B．realized |
| C．realizing |
| D．being realized |
No one in the factory but the brothers _____ that our factory will be closed because of the financial problem.
| A．knows | B．know | C．have known | D．knew |
The girl left home after quarreling with her parents, _____ them quite worried.
| A．making | B．made | C．to make | D．makes |
Not until ___to do my homework ____ how much time I had wasted playing computer games.
| A．I began; I realized |
| B．I began; did I realize |
| C．did I begin; I realized |
| D．did I begin; did I realize |
He has made another wonderful discovery, _____ I think is of great importance to science.
| A．which | B．what | C．when | D．that |
－What’s that terrible noise?
－The neighbours _____ the lawn.
| A．mow | B．are mowing | C．have mowed | D．will mow |