A. had wroked B. has worked C. was working D. has been working
A. type B. typing C. to type D. typed
A. will be completed B. completes C. has completed D. was completed
As if B. Ever since C. In case D. Even though
A. more effective B. most effective C. effective D. least effective
A. out B. into C. down D. through
A. what B. whose C. that D. which
A. reading B. read C. was reading D. to read
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