1.           ______When_____ Jim came home, he realized that someone had broken into his house.

2.           You’d better bring your raincoat ______in case___ rain pours down.

3.           They have been colleagues ___since______ they graduated.

4.           _____Unless_____ Jim puts more effort in his studying, he won’t catch up with his classmates.

5.           My mother always reminds me to wash my hands ___before____ I have meals.

6.           We will go picnicking ______as long as_____ the weather is fine.

7.           James behaved ______as though_____ nothing had happened.

8.           I can’t make it on Saturday _____because______ I will be fully occupied.

9.    When I got home; my father was mowing the lawn ____while_______ my mother was watering the flower beds.

10.        ______Though_____ I don’t get on well with Mary, I really admire her intelligence and beauty.