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【单选题】
8255A芯片具有三个独立数据端口,只有_______端口具有双向传输方式。A.
A口
B.
B口
C.
C口
D.
以上均可
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举一反三
【单选题】—I wonder if he _____ us in the discussion tonight. —I believe if he _____ his homework, he will join us. [ ]
A.
will join; will finish
B.
will join; finishes
C.
joins; finishes
D.
joins; will finish
【单选题】—I wonder if he _____ tomorrow. —I'm sure he _____ if he _____ free. [ ]
A.
will come; comes; will be
B.
comes; will come; is
C.
comes; comes; will be
D.
will come; will come; is
【单选题】I wonder why Mr. Wang did not attend the lecture. He _____ another one. [ ]
A.
could have
B.
must have
C.
might have had
D.
should have
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