Their cheerful voices showed that they were having a discussion.
| A．noisy | B．friendly | C．serious | D．nervous |
I suffered from _____ terrible cold that day and my friends told me to go to _____ doctor’s after work.
| A．不填; the | B．a; the |
| C．a; 不填 | D．不填; 不填 |
—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 |