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15.—Daniel,too much homework makes us tired.What about going out for a walk?

—All work and no play makes Jack a dull boy.

   A. I see.        B. You’re welcome.

   C. Why not?        D. Of course not.

20.—Some children can’t go to school because their parents are poor.

—I'm sorry to hear that.How (luck) we are!

19.一Do you like the coffee?

—It’s very nice.But it will be much (good) with some milk in it.

18.—Is this your book,Jack?

—No,it’s not (I) .It is Lily’s.

17.Lily lives on the ( twentyone) floor in a tall building.

16.Da Vinci’s (paint ) are the most important treasure for people.

15.Autumn comes here,and the (leaf) turn yellow or red.

14.My parents usually watch TV in the (live) room.

13.There are lots of (west) restaurants here.

12.Mv younger son is five and my (old) son is nine.