—I wonder why Tom left without a word.
—He __________ have had some trouble, for he looked dull.
A.should |
B.must |
C.can |
D.could |
推荐套卷
—I wonder why Tom left without a word.
—He __________ have had some trouble, for he looked dull.
A.should |
B.must |
C.can |
D.could |