－Are those his friends －________.

suppose you need more people to do the work.—Don’t you know “Three helping one another _________ the load of six”?

The university estimates that living expenses for international students _________ around $8,450 per year, which _________ a burden for some of them.

下列各句中，没有语病的一句是（ ）

The traffic is heavy these days.I _____ arrive a bit late, so could you save me a place? [ ]