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 The boy spent two whole days _______ in the room.

   A. to lock      B. locking      C. having locked     D. locked

 Catching ______ sight of their headteacher coming, the students fell silence in _______ flash.

   A. the, the          B. /, a        C. the, /       D. /, /

 ______from space, our earth, ______with water 70% of its surface, appears as a “ blue planet”

   A. Seeing, covering    B. Having seen, covered    C. To see, covered    D. Seen, covered

 It is a good habit to keep everything _______ in your study.

   A. in place   B. in the place   C. out of place  D. out of the place

 The enrolment (注冊，考入) of our school _____ to 3,000 this year while it was 1,000 last year.

   A. swelled     B. added       C. raised     D. lifted

 A good idea occurred to Mr. Bark ________ to his invention recently.

   A. while applying                  B. while applied 

C. while he was applying himself      D. while applying himself

 The policeman stopped him when he was driving home and _______ him of speeding.

   A. charged    B. accused    C. blamed     D. scold

 His remarks made a deep impression ______ the young girl.

   A. in     B. on     C. for     D. to

 Her father____ in the USA for another years, so that she could work toward he master’s degree.

   A. agreed he to stay   B. permitted her stay  C. let her staying   D. approved of her staying

 The game is going to start in a minute. Let’s _______.

   A. take up      B. build up     C. speed up    D. sweep up