We asked both john and jerry, but ______ could offer a satisfactory explanation.
A.both
B.either
C.neither
D.none
第2题
A.hesitating
B.hesitated
C.to hesitate
D.having hesitated
第3题
A.leaves
B.left
C.has left
D.is leaving
第4题
A.expected
B.has expected
C.expects
D.is expected
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