D. Being a few minutes late

15. They came to the conclusion ________ by a computer.

A. that not all things can be done

B. because of not all things be done

C. being not all things can be done

D. because not all things can be done

16. Why the explosion occurred was ________ the laboratory attendant had been careless.

A. for B. because C. since D. that

17. I don't doubt ________ he'll come.

A. that B. if C. what D. whether

18."Why did you go to the wrong class, Mr. Wang "

"Well, I forget _______ I was supposed to go to."

A. which the room B. which room C. what was the room D. what room was it

19. Output is now six times ________ it was before liberation.

A. that B. which C. what D. of which

20. Mary: Helen is a mere washer woman, yet she's now buying a big house.

Carol: Yes. Because she's always saved ________.

A. what little she earns B. how little she earns

C. for little she earns D. with little she earns

21._______ surprised me most was ________ such a little boy of seven could play the violin so well.

A. That...what B. What...that C. That...which D. What...which

22. We gave him ________ help we could.

A. which B. what C. that D. this

23. She is pleased with what you have given him and ________ you have told him.

A. that B. which C. all what D. all that

24. Excuse me would you please tell me ________

A. when the sports meet is taken place

B. when is the sports meet going to be held

C. when is the sports meet to begin

D. when the sports meet is to take place

25. Do you happen to know ________

A. what size shoes he wears

B. how big shoes he wears

C. what is the size of his shoes

D. what number shoes are his

26. This book will show you ________ can be used in other contexts.

A. how you have observed

B. how what you have observed

C. that you have observed

D. how that you have observed

27. Where do you think ________

A. has he gone B. has he been