____ books you read, ____ knowledge you will gain.

A. The many, the more     B. The more, the much

C. The more, the more     D. The many, the much

 Which of the two cows ____ you keep produces more milk?

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

 _____let me introduce my friends to you, Mr. Smith.
A. In all    B. After all    C. Above all   D. First of all

Is this factory ____ you visited last year?

A. that     B. which      C. where     D. the one

 As the final examination was coming, the teachers were busy_____ the test papers.
A. preparing   B. preparing for   C. prepared  D. prepared for

 She decided to buy the house,  ______the windows faced the blue sea.
A. whose     B. which      C. of which    D. that

 Do remember to wash the vegetables ___________.

A. as clean as possibly           B. as cleanly as possible

C. as clean as possible           D. as clean as you do

---- How do you like the cake? 

----- It’s quite different from _________ I had last month.

 A. that          B. which      C. the one         D. the one what

 Robert and his songs ____ were famous in the United States are also popular in China.

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

 The most interesting thing ____ we should pay attention to is the first thing ____ I have said.

A. which; that     B. that; which   C. which; which    D. that; that