Question

第三题为什么选C

Answer 1

第三题应该选A
While listening to the tape, you should be careful.
While listening to the tape可理解为While you are listening to the tape的省略形式。也可以理解为现在分词短语在句中作时间状语，while用于明确状语类型。

Answer 2

ive you some advice abou

Answer 3

为什么我觉得应该是A😂

Answer 4

a是对的，c错的。