__when you cross the road.

单选题

__when you cross the road.

答案解析

单选题

You are about to cross a narrow channel when you see an approaching vessel that can only be navigated safely within the channel. You should ____ .A. cross the channel as you are the stand-on vesselB. cross only if the vessel in the channel is approaching on your port sideC. not cross the channel if you might impede the other vesselD. sound the danger signal

答案解析

单选题

The difference was _____ cross the river.

答案解析

单选题

Youd better not go abroad,( )__when COVID-19 is still spreading around the world.

答案解析

单选题

_____ cross the road until the traffic lights turn green.

答案解析