This is my dear teacher without_________help I couldn’t have passed that difficult exam.
| A．who | B．whom | C．whose | D．that |
______ on this report the English government decided to ask Captain Cook to go and look for this continent.
| A．Having based | B．Basing | C．Based | D．To be based |
Those who show respect for others will be respected ________.
| A．in response | B．in return | C．in turn | D．in place. |
Darwin counted 225 flowering plants, ______ he collected and brought home 193.
| A．which | B．for which | C．in which | D．of which |
He came to my class every week, but his attitude _______he was not really interested in the subject.
| A．expressed | B．described | C．explained | D．suggested |
Why didn't you tell me there was no meeting today? Iall the way here through the heavy snow.
| A．needn't have driven | B．can't have driven |
| C．mustn't have driven | D．shouldn't have driven |