—Don’t give up, my children. Keep ________ and you will be successful.
—Thank you, Mr. Wang. We’ll try our best.
A. working on B. working off
C. for working D. to work
—Can you come to have dinner with me this evening?
—I’m afraid not. I _______ take care of my grandmother. She is ill.
A. can’t B. have to C. may D. could
We can’t work out the physics problem. Can you tell us________?
A. how to do B. what to do it
C. how to do it D. what should to do
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
—Dad, can I go to the movies tonight?
—Sure, but you ________ come back home before 9 o’clock.
A. can B. must C. may D. might
The sun was shining brightly, ________ everything there _______ more beautiful.
A. making; look B. to make; looked
C. and made; looking D. and making; be looked
