---Leave the windows open.

---______.

1. A.
   That’s right.
2. B.
   That’s all right.
3. C.
   OK, I will.
4. D.
   Thank you.

Leave the keys out ______ I remember to take them with me.

1. A.
   such that
2. B.
   so that
3. C.
   because
4. D.
   since

leave （现在分词）________　　　　　　

--______ you leave now?
---Yes, because I’m meeting my aunt at 7:00 this evening.

--______ you leave now?

---Yes, because I’m meeting my aunt at 7:00 this evening.

A．Can              B．May              C．Need             D．Must