英語狀語從句鞏固練習題（含講解）
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：該題考查的是引導狀語從句的從屬連詞的選擇。從意思上看，從句應是一個條件狀語從句，在這四個選項中只有if能引導條件狀語從句，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引導的時間狀語從句。結合題意"我的叔叔自從二十歲以來就一直在這所學校教書"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引導的讓步狀語從句。結合題意"儘管他們不可能成功，但是他們將盡全力"可排除B、C、D三項，故正確答案爲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。"要表達着一意思應用"not…until" 這一句型。
