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Unit 10 一、单选题 1.The woman visitor _there many times. A. has gone to B. has been C. has been to D. has gone 2.Mr. Zhang _ in Shanghai since he started working as a teacher here. A. stays B. stayed C. has stayed D. had stayed 3.- did your uncle leave for the capital of Denmark? - Let me see. He for nearly 20 months.( ) A. When; has left B. When; has been away C. How long; has left D. How long; has been away 4.The country life he was used to _ greatly since 1992. A. change B. has changed C. changing D. have changed 5.—The old man for three months, didn't you know? —Yes, I did. He on January 7 th. A. has died; has died B. has died; died C. has been dead; died D. has been dead; has been dead 6.—I have _ finished my homework. What about you?—I finished it _. A. just; just B. just now; just now C. just; just now D. just now; just 7.My father _ my mother when they were both 30 years old, and they _ for 20 years. A. married; have married B. married with; have been married C. was married; have married D. married; have been married 8.一 Have you got a car?—Yes, I_ . A. am B. do C. have D. has 9.—Our country _ a lot so far.—Yes. I hope it will be even _. A. has changed; well B. changed; good C. has changed; better D. changed; better 10.—Hey! Kate, what about your last winter camp in Hainan? —Oh! It _ some sweet memories in my heart in the past several months. A. leaves B. is leaving C. has left D. will leave 二、完形填空 There are many brave and talented people who work in different branches(分科;分支)of science. Extreme(另类的)scientists are people who work in very difficult and dangerous places. They don't work in a (11) all the time like other scientists do. Instead, they search (12) information that can only be gathered through firsthand experiences. These scientists have to explore deep caves, swim with sharks or act as swan(天鹅)mothers. The number of great white sharks in the world (13) smaller now. They are one of (14) animals on Earth. Scientists need to find out how many sharks (1