A.could | B.might | C.would | D.should |
A.could buy | B.had bought | C.would buy | D.could have bought |
A.must; as though | B.can; as for | C.will; before long | D.should; long before |
A.should | B.used to | C.might | D.would |
A.should be | B.to be | C.be | D.to being |
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