----When did you arrive ________ Hong Kong?
----We got there ________ the evening of Dec. 25.
| A．in; in | B．at; in | C．in; on | D．at; on |
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