A.examined；are not having
B.had examined；would not have
C.had examined；would not have had
D.should examine；would not have
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A.can we solve
B.we can solve
C.we will solve
D.can we solved
A.represent
B.represents
C.representing
D.being represented
A.will set
B.shall set
C.set
D.sets
A.has finished
B.finishes
C.had finished
D.would finish
A.to repair；to renew
B.repairing；be renewed
C.repairing；will be renewed
D.to repair；to be renewed
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