Question

【题目】It's dangerous (穿马路) when the traffic is busy.

Answer 1

【答案】to cross the street
【解析】句意：交通拥挤的时候穿马路是很危险的。短语：cross the street穿马路。句型：It's+形容词+to do sth 做某事是……；所以答案是to cross the street。