--- The fog is so thick that the express way ____ have been closed.
--- You are right. I ____ have thought of that. Now we have to take another road.
A.can; should | B.may; can | C.should; must | D.must; should |
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--- The fog is so thick that the express way ____ have been closed.
--- You are right. I ____ have thought of that. Now we have to take another road.
A.can; should | B.may; can | C.should; must | D.must; should |