—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
They decided ________ after dinner.
A. have a broke B. have a break
C. to have a broke D. to have a break
