动词填空。 1. If it rains tomorrow, we _______ (stay) at home. 2. Their parents _______ (buy) a new flat when he was born. 3. How long _______ you _______ (be) like this ? 4. Did you see the man _______ (lie) on the playground? 5. _______ you _______ (mop) the floor yet? 6. How lucky we are _______ (live) in this modern city! 7. Her mother _______ (teach) in the school over the ten years. 8. The Greens _______ (have) supper right now. But we _______ (just eat) it. 9. What _______ you _______ (do) while the others were cleaning the classroom?