15.. ____ doesn’t matter how much you spent on books.

A .What　　 B. That　　 C. It　　 　D. which

14. ____ we can’t get seems better than ____ we have．

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

13. It was not until midnight _______ they reached the camp site.

A. that　　　 B. when　　　 C. while　　　　 D. as

12. Your didn’t pass the driving test . _____, you failed.

A. In the end　　 B. After all　　 C. In other words　　 D. At the same time

11. Only in this way, _______succeed in solving the problem.

　 A.you can　 　B. can you　　 C. you would　 D. could you