A number of students ____ seen the film. That is，the number of the students who have seen the film____ large.
| A．have; is | B．has；are |
| C．has; is | D．have； is |
—Do you mean that we have lost our way?
—_____, my dear. We’d better ask someone for help.
| A．Exactly | B．Entirely |
| C．No problem | D．All right |
__________ in the mountains for a week, the two students were finally saved by the local police.
| A．Having lost | B．Lost |
| C．Being lost | D．Losing |
When different cultures, we often pay attention only to the differences without noticing the similarities.
| A．compared | B．to compare |
| C．comparing | D．being compared |
Unless ___ to speak，you should remain silent at the conference．
| A．invited | B．inviting |
| C．being invited | D．having invited |
When I came back, I found my clothes , on the bed.
| A．folded, lay | B．folded, lain |
| C．folding, lying | D．folded, lying |