It remains unknown _____the peace talk between the two countries is going to lead.
| A．why | B．when | C．how | D．where |
Those photos _____ the happy memories of my beautiful school days.
| A．set back | B．gave back | C．turned back | D．brought back |
Miss Woody made _____ clear that she would never have cooperation with that company.
| A．that | B．what | C．which | D．it |
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 |