填空：Most of the ______(Europe) countries are very rich.When _____every student _____(start)theirlessons?

填空：Most of the ______(Europe) countries are very rich.When _____every student _____(start)their
lessons?

european does start

Europeans did start

European does，start或did，start或was，starting

Europwans　did　start　，这个是对的