A.would | B.should | C.could | D.might |
A.could have expressed | B.could express | C.must have expressed | D.would express |
A.may go through | B.might go through |
C.must have gone through | D.ought to have gone through |
A.must know | B.might have known | C.must have known | D.should have known |
A.should; ought to | B.could; should | C.might; mustn’t | D.can; can’t |
A.should | B.shall | C.would | D.may |
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