a very hard-working student.— ______. As far as I know, he often burns the midnight oil.

ter met him at the street yesterdayafternoon, so he __________ your lecture.

I’ll lend you my car _______ you return itintact.

It is _____ we do —- you and I ____ changes the world.

The workers have produced ____ cotton this year as they did two years ago [ ]