There is no doubt you will pass the exam this time. You have worked so hard in the past months.
| A．whether | B．that | C．if | D．what |
Switzerland refused to_________ the two world wars.
| A．take part | B．take sides in |
| C．join | D．attend |
Mr Black is the professor_________I have the greatest respect.
| A．to whom | B．for whom |
| C．whom | D．who |
—She was late for the party.
—That’s _________she had forgotten the exact time.
| A．why | B．how |
| C．because | D．whether |
Do you know_________they are getting on well with the project?
| A．whether | B．what |
| C．how | D．when |
.The plane went off its_________ to keep away from the sudden storm.
| A．road | B．course |
| C．fly | D．direction |