1、The millions of calculations involved, had they been done by hand, ________all　practical value by the time they were finished.

　　A.had lost　　B.would lose　　C.would have lost　　D.should have lost

　　2、As a public relations officer, he is said ________some very influential people.

　　A.to have been knowing　　B.to be knowing　　C.to have known　　D.to know

　　3、Our hopes ________and fell in the same instant.

　　A.aroused　　B.arose　　C.raised　　D.rose

　　4、With the development in science and technology man can make various flowers ________ before their time.

　　A.be bloomed　　B.blooming　　C.bloom　　D.bloomed

　参考答案：

　　1、C　2、D　3、D　4、C