Tony used to _______ to school, but he is used to _______ to school now.
| A．walk; taking a bus | B．walked; took a bus |
| C．walk; take a bus | D．walked; taking a bus |
Mr. Wang often says to her child, “You _______ play with fire(火). It’s dangerous.
A. mustn’t B. had better C. needn’t
—Could you please ________us some stories? —OK.
A. say B. talk C. tell
My uncle says that it’s his duty ________the patients.
A. save B. to save C. saving
As we know, ________ is good exercise and it is necessary for health.
A. walk B. walks C. walking
—Must I finish my homework before I go home?
—No, you ________. But you ________ finish it before tomorrow.
A. mustn’t, must
B. needn’t, must
C. needn’t, mustn’t