71.She hasn‘t decided with ______ she should first make contact.

　　A. who B. whom C. how D. which

　　72.That is ______ we differ.

　　A. that B. where C. what D. whether

　　73.Another worry is that telecommunication systems may isolate people ______ each other.

　　A. from B. for C. with D. to

　　74.If I ______ in your place， I wouldn‘t trouble him.

　　A. were B. had been C. could be D. was to be

　　75._______ the moon moves round the earth is well known to all of us.

　　A. That B. What C. When D. As

　　參考答案：

　　71.正確答案：B答案解析：with用于與make contact搭配。本題使用的短語是make contact with sb.whom在本句中引導(dǎo)的句子做介詞with的賓語。由于位于介詞后面，所以用賓格形式whom.

　　72.正確答案：B答案解析：where在本句中引導(dǎo)表語從句。句意：這就是我們的不同之所在。

　　73.正確答案：A答案解析：isolate sb/sth from sb/sth是固定搭配。

　　74.正確答案：A答案解析：本句是對(duì)現(xiàn)在的虛擬，所以條件狀語從句用過去時(shí)。同時(shí)在虛擬語氣中，一般不用was而一律用were，所以答案是A.

　　75.正確答案：A答案解析：本題的考點(diǎn)是：That引導(dǎo)的主語從句，注意that引導(dǎo)的主語從句在句中只起到連接作用，沒有意義，也不做任何成分。