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A. has worked B. worked

C. had worked D. works

A. it B. which

C. that D. by which

A. he does B. he did

C. does he D. did he

A. finished B. has finished

C. had finished D. was finishing

A. hidden away B. hid it away

C. hidden away it D. hidden it away

—Don’t mention it. I spent much time on ______ boring stories during the summer holidays.

A. a series B. serieses of

C. a series of D. series of

A. While; soon B. For; right away

C. Once; at once D. Until; immediately

A. that B. where

C. when D. in which

A. basing at B. based on

C. bases on D. to base at

A. What are you going to carry B. What you are going to

C. What you are going to carry D. What are you going to