1 . Laughter is the best medicine, _________ means keeping a good mood is helpful to our health.

A．what

B．which

C．that

D．it

2 . The wonderful moment, ________ we had been expecting for years, finally came.

A．which

B．that

C．what

D．when

3 . The country is now the world’s largest exporter of goods and the second largest importer, ________ has created millions of jobs in export industry and related areas.

A．it

B．what

C．that

D．which

4 . At the end of the program, the students are paid $600—a way this program differs from others, ________ often charge a fee.

A．who

B．that

C．they

D．which

5 . Have you ever been in an embarrassing situation, my dear friends, ________ you can’t change but have to face?

A．where

B．who

C．which

D．when

6 . I recommended ________ an English-Chinese dictionary, ________ I thought would be of great help to his studies.

A．buying; that

B．to buy; that

C．buying; which

D．to buy; which