We usually stay_____ home______ Saturday afternoon.
| A．at, in | B．at, on | C．in, at | D．on, on |
Mary_____ her mother _____the problem.
A. tell; off B. tells; about C. telling; for
Is it good _______bad to surf the Net?.
A. and B. or C. but
It was _______accident.
A. a B. anC./
We should ______healthy food
A. to eat B. eating C.eat
找出不同类的单词。
（）（1）A.playB. angryC. run
( ）（2）A.carB.catC.bus
（）（3）A.carrot B. cabbage C. chair
( ) （4）A. cheap B. expensive C. book
() （5） A. green B. purpleC.bag