Learning to write is learning to think. You don’t know things clearly _________ you can writethem down.

How was your weekend, Jack—It was great. I my aunt in the countryside.

My parents have promised to come to see me before I _____for Africa.

We’d be very grateful if you could join us because your cooperation will________the timely completion of our project.

People love the convenience of bottled water, but if they ________ the problem it causes, they ________ try carrying water in a reusable steel container instead of plastic.