The trouble is _______ he has never done the work before.

A. that　　   B. how　　　　   C. whether　　　　   D. when

_____ is here gets a prize.

A. Who　　　　  B. Whoever　　　　  C. Those　　　　  D. He

48.He left home early only ________ he was late as he went a wrong way.

46.Having no money but ________ to know, he simply said he would go without dinner.

43.Nancy isn't here. It's my mistake. I forgot all about ________ her.

A. telephoning　　　　　　　　　　    B. to telephone  

C. to telephone to　　　　　　　　　　    D. the telephoning to

39.[1994全国] The first textbooks ________ for teaching English as a foreign language came out in the 16th century.

37.[1994全国]—I must apologize for ________ ahead of time.

—That's all right.

36.[1993全国] Charles Babbage is generally considered ________ the first computer.

A. to invent　　　　　　　　　　    B. inventing　　  

C. to have invented　　　　　　　　　　    D. having invented

35.[1993全国] ________ down the radio—the baby's asleep in the next room.

33.[1993全国] How about the two of us ________ a walk down the garden?