A. Either, use B. Neither, use
C. Both, not to use D. Neither, to use
A. gave off; to help B. gave up; helping
C. gave away; to help D. gave; helping
A. look at B. look for C. look up D. look after.
A. what should I choose B. which I should choose
C. which should I choose D. what I should choose
A. must be repaired B. was repairing C. must repair D. has repaired
A. if B. so C. though D. and
A. How long B. How soon C. How far D. How often
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