How many children have you got —Two , _______ of them are studying in the university.

If you intend to arouse students’ interest in your project, you’d better ______ your teaching methods more wisely.

The boy ________ his book here and forgot ________ ithome.

We hope to go to the beach tomorrow, but we won’t go ____ it’s raining

________________________________—–I’ve got a headache and a bad cold.