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
_____ have you been swimming? For five years.
A. How many times B. How long
C. How often D. How much
