You must (follow) the directions (exactly), and if you become (confusing), you must take the time (to go) back and read them ove

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问题 You must (follow) the directions (exactly), and if you become (confusing), you must take the time (to go) back and read them over.

选项 A、follow
B、exactly
C、confusing
D、to go

答案C

解析
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