埋弧焊的主要危险是（）。
A、触电
B、高空坠落
C、中毒
D、爆炸
参考答案：A
有的同学为了更好地展现青春，想方设法跟上“潮流”，为此他们花了不少时间和精力，即使一定程度上影响了学习他们也认为是值得的。[ ]
He _____and his friends took her to hospital just now.[ ]
A. felt excited
B. became interested
C. became happy
D. felt sick
