is a great potential for thedevelopment of Sino-US trade, ______ is in line with the interests of the twocountries and their people,” Wu said

It was a real race __________ time to get the project completed in such a short time.

In my family,our kids aren’t allowed to play outside _____they finish their homework.

If we ______ day before yesterday, we would have done the job.

vive in the world, we have to act _______ others, but to survive as ourselves, we have to act alone.