Helen _______ it if she doesn’t want to.

A. doesn’t need do   B. need not to do  C. needs not to do   D. need not do

--- I didn’t go to class last night because my car broke down.

  --- You _______ mine. I wasn’t using it.

    A. could borrow                      B. may borrow

 C. could have borrowed                D. may have borrowed

He kept looking at her, wondering whether he _____ her somewhere.

    A. saw             B. has seen       C. sees           D. had seen

________ is where he gets all his money from.

    A. What I can’t understand it            B. That I can’t understand 

 C. What I can’t understand              D. Which I can’t understand it

_______ of my classmates could work out the maths problem because it was too difficult.

    A. Each            B. No one        C. None          D. Any

When he got home, he found the door _____, the window ______, the money and the necklace in the drawer _____.

 A. shut; opened; stolen                 B. shut; open; stolen

 C. shut; open; steal                    D. shuted; open; stolen

__________ the plan many times, but he still didn’t understand.

A. Having told him                     B. Having been told him

C. Though he had been told              D. He was told

Zhongguancun made __________ for him to realize his dream. 

 A. that possible     B. it a possible    C. that a possible    D. it possible

I’m very happy _________ a chance to visit your country.

     A. to have given    B. to give        C. giving           D. to be given

________ to sunlight for too much time will do harm to one’s skin.

   A. Exposed                      B. Having exposed

   C. Being exposed                 D. After being exposed