After _____ seemed a short time, the young man returned to his office with a book in his hand.

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

I think that this meal was well worth ____was charged for it.

A. that　 　　 B. what 　　 C. which　 　 D. how many

 Nowadays, teachers tend to be more dependent on _______ is thought to be a great teaching aid---the computer.

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

______ the boy did never satisfied his stepmother.

   A. However   B. Whatever   C. No matter how   D. No matter what

The shopkeeper did not want to sell for _____ he thought was not enough.

   A. where     B. how     C. what     D. which

We should consider the students’ request _______ the school library provide more books on popular science.

A. when                    B. that                C. where            D. which

_________ you learned from the report is ____________.

A. What , importance                B. What , of great importance

C. That , of great importance         D. What , of important

        surprises us most is that she doesn’t even know           the difference between the two lies.

A. What; where       B. All; which      C. What; that          D. That; where

A healthy food includes all types of food, ______ no single food or food group can provide all the nutrients our body needs.

A. if　　　　 B. when　　　 　　　 C. which　　 　 　　 D. because

 Don’t promise anything ______ you are one hundred percent sure.

A. whether      B. after     C. how     D. unless