練習題一
1. The professor said he could talk on _____ interested the audience.
A. any topic B. which topic
C. whichever topic D. the topic he thought it
2. No matter how frequently _____ the works of Beethoven always attract a large number of people.
A. performing B. performed
C. to be performed D. being performed
3. _____ their real economic situations， they got some relief fund from the government.
A. Considering B. Considered
C. Having been considered D. Being considered
4. When you are in your room,leave the door so that your visitors do not have to knock.
ed ing g open
5. Earth is believed to by an object the size of Mars at some point in the distant past before its surface cooled.
hit hit been hit g hit
flights________because of the terrible weather, they had to go there by train.
ng been canceled been canceled
ng canceled canceled
author of the report is well________with the problems in the hospital because he has been working there for many years.
rmed ainted ghtened owledged
參考答案：
1. hever已失去疑問含義，等於 anything that，表示強調;而 which topic中 which保留疑問含義，譯成“哪一個題目”，不符合句意。而A項和D項中缺少連詞。故答案為C.
2. B.在讓步、時間等狀語從句中，如果主從句中主語一致，從句中謂語含 be動詞，可以將從句中的主語和 be 省略，即在how 後加they (the works) are，再分別與選擇項搭配，就能得出正確答案。故答案為B.
3. idering“考慮到”，而 considered“被認為”，根據全句含義，句中主語they和considering是主動關係。故答案為A.
4. A.這是一個固定結構，“leave…+ v.”表示“讓……保持一種狀態”，後面應該用動詞原形或形容詞形式，如：Leave me alone. 讓我靜一靜。這樣的結構還有：Let it be. 隨它去吧。
5. C.本題考查非謂語動詞，首先，本句應使用動詞不定式的完成式，表示動作已完成(非謂語動詞動作發生在前)。其次，要注意語態，本句應使用被動語態，所以綜合考慮應該選C選項。
6、A。考點：非謂語動詞的用法。分析結構可知逗號前面部分是一個狀語結構，故可以排除B、D;又因為All flights與cancel為被動關係，所以應選A。句意：由於天氣惡劣，所有的航班都已經取消了，他們不得不改乘火車去那兒。
7、B。考點：動詞與介詞的搭配。四個選項中只有acquainted可以和介詞with搭配，be acquainted with意為“對……熟悉”。句意：報告的作者很熟悉那家醫院存在的問題，因為他在那兒工作了許多年。
