问题
选择题
You must be _______when you ______he the road.[ ]
A.careful;cross
B.carefully;cross
C.careful;across
D.carefully;across
答案
答案：A
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You must be _______when you ______he the road.[ ]
A.careful;cross
B.carefully;cross
C.careful;across
D.carefully;across
答案：A