第二部分 英语知识运用（共两节，满分45分）
第一节 单项填空（共15小题；每小题1分，满分15分）
从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．－Mom, I’m so tired. I can’t walk any further.
－_______, my dear. You can make it.
A．Come on B．No worry C．That’s impossible D．No problem
My calculations were based on the ________ that house prices would remain steady.
| A．theory | B．assumption | C．procedure | D．regulation |
You are saying that everyone should be equal, and this is ___ I disagree.
| A．why | B．where | C．what | D．How |
Her parents objected to _________ that farmer, though he was very rich.
| A．she married | B．her to marry | C．marry | D．her marrying |
Scientists have achieved a major ___ in the search for a cure for cancer, ____ is good news for those who suffer from cancer.
| A．breakthrough; what | B．breakdown; which |
| C．breakup; that | D．breakthrough; which |
—Mary was being badly treated when John happened to pass by and helped her out.
—I think it was not a pure ________but had been well planned.
| A．coincidence | B．consequence | C．incident | D．chance |