A. are B. was C. were D. have been
A. to B. for C. in D. up
A. unless B. until C. if D. whether
A. to sell B. selling C. sold D. in selling
A. would observe B. observe C. observed D. will observe
A. would go B. would have gone C. went D. was
A. to B. on C. for D. at
A. is B. are C. is to be D. are to be
A. in place of B. out of place C. place D. the place of
A. are B. is C. were D. have been
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