33. Is it the letter you got yesterday makes you so sad?A. whatB. thatC. howD. When

问题补充：

33. Is it the letter you got yesterday makes you so sad?

A. what

B. that

C. how

D. When

答案：

A. what

(答案→)B. that

C. how

D. When

解析：可联系答.案.网客服索取。