Kate's dad is getting old. She will go back home to see him _____it is convenient.

I’ll go to visit my aunt in England _____ the summer holidays start..

　　　　 it rained heavily this morning, nobody in our class missed the lesson.

David, get up early, ________ you’ll catch the early bus.

---Finish your homework __________ you can’t play computer games, Jim.
---All right, Mum.

I have ____a raincoat _____ an umbrella. That’s why I have to wait until the rain stops.

—Does your mother often surf the Internet ?
—Yes, ___________ she doesn’t buy any thing on line.

I have to leave now __ I can catch the last bus.

Our math teacher is very kind ______ he looks very serious.

They are _______ little sheep that we can’t make much money by selling _______.