—Can we ski on this mountain? —Of cours
题型:选择题
问题:
—Can we ski on this mountain?
—Of course.However, at no time _______ you do so alone.
A.could
B.might
C.need
D.must
—Can we ski on this mountain?
—Of course.However, at no time _______ you do so alone.
A.could
B.might
C.need
D.must