Betty will ring me up when she ________ in Beijing.
A. arrive B. arrives C. arrived D. will arrive
We don’t know ________ it next. Let’s go and ask Mr. Li.
A. what to do B. to do what C. whether to do D. to do whether
I’m glad to find that many trees ________ in our city last year.
A. plant B. planted C. were planted D. are planted
The more you smile, the ________ you will feel.
A. happy B. happier C. happily D. more happily
–Mr. Wang, can I finish my homework tomorrow? --Sorry, you ________.
A. can’t B. don’t C. needn’t D. won’t
The government of Chongqing is building ________ cheap and good houses for the people.
A. thousand B. thousands C. thousand of D. thousands of
