David has become a ________ young writer.
A. succeed B. success
C. successful D. Successfully
Jack, your bedroom is in a terrible mess. Please .
A. tidy it up B. take it off
C. make it up D. put it away
Smile to the world, the world will smile back to you.
A. nor B. but C. or D. And
—How long will the summer English courses ? —For six weeks.
A. last B. open C. begin D. Start
For the present, I can’t afford ________ a car.
A. to buy B. buy C. buying D. for buying
I have been skating _______ nine o’clock.
A. for B. since C. at D. From
