We'll supply you with the products only __________ you prove your ability of payment.
--- Let’s go shopping, shall we? --- Wait a minute. I ________ my housework and it won’t take long.
It’s more than half a century ________ my grandfather joined the Party and became a servant to the people.
We ________ the project on time without your timely help .
You________ the work better, but you didn’t put more efforts to it.
The professor you referred to in the letter______ us students three lectures by next Monday.