49.Spanish and French are taught. You may choose _____ you like.

　 A.whomever　 B.which　 C.whichever　　 D.whatever

48.You may take ________ book you like.

　 A.which　 B.only　 C.whichever　　 D.what

47.Do you know _____________?

　 A.who is she　　　 B.who she is　　

　 C.whom she is　　　 D.she is who

46.__________ came to see me?

　 A.Who you think　　　　 B.Do you think who

　 C.Who do you think　　　 D.Whom do you think

44.This is one of the examples of _______ by telegraph.

　 A.how are messages sent 　　B.that messages are sent

　 C.that are messages sent　　　 D.how messages are sent

you tell me _______exercise is the easiest?

　 A.what　　 B.if　　 C.which　　 D.that

43.The problem _______ we can master modern science and technology in　　　 a short time.

　 A.is if　 B.is that　　 C.is what　 D.is how

42._______mathematics is the base of all other science.

A.This is because　　　 B.This is that　

C.It is that　　　　　　 D.Because

41.The fact ______ he was successful proves his ability.

　 A.that　　 B.what　　　 C.which　　 D.why

40.Smith came here to look for someone, but I didn't know______was the one he was looking for.

　 A.who　　 B.whomever　　 C.whom　　 D.whatever

39.It is certain _______he will come.

　　 A./　　 B.that　　　　 C.what　　　 D.which