1.You will stay healthy _______ you do more exercise, such as running and walking.

　　A. if B. how C. before D. where

答案：A

解析：該題考查的是引導(dǎo)狀語從句的從屬連詞的選擇。從意思上看，從句應(yīng)是一個條件狀語從句，在這四個選項中只有if能引導(dǎo)條件狀語從句，所以選A。

2.?My uncle has been taught in this school _______ he was twenty years old.

　　A. since B. for C. until D. after

答案：A

解析：考查since引導(dǎo)的時間狀語從句。結(jié)合題意"我的叔叔自從二十歲以來就一直在這所學(xué)校教書"可排除B、C、D三項，選A。

3.______ they may not succeed, they will try their best.

　　A. Though B. When C. Because D. Unless

答案：?A

解析：考查though引導(dǎo)的讓步狀語從句。結(jié)合題意"盡管他們不可能成功，但是他們將盡全力"可排除B、C、D三項，故正確答案為A。

4.--Shall we go on working?

　　---Yes, _________ I prefer to have a rest.

　　A. when B. if C. because D. though

答案：D

解析：該題考查的是引導(dǎo)狀語從句的從屬連詞的選擇。從意思上看，只有選though才能說得通。
?

5.?None of us knew what had happened _________ they told us about it.

　　A. when B. until C. after D. though

答案：B

解析：該題考查的是引導(dǎo)狀語從句的從屬連詞選擇。本句的意思是"在……以前我們沒人知道這件事。"要表達著一意思應(yīng)用"not…until" 這一句型。

以上就是本期的英語鞏固測試題。每天練習(xí)一點，堅持就有成果。加油練習(xí)吧。