On no account ________ to feed the animals.
A. are visitors allowed
B. visitors are allowed
C. do visitors allow
D. visitors allow
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Don’t you know him? ________
A. Yes, I do.
B. Yes, I don’t.
C. No, I do.
D. Yes, I don’t know.
He ________ on winter mornings, but now he doesn’t.
A. used to swimming
B. is used to swim
C. used to swim
D. is used to swimming
The drug proved ________.
A. highly effectively
B. highly effective
C. to be highly effectively
D. be highly effectively
The policeman entered the building, ________ upstairs.
A. looking around and to hurry
B. looking about and hurrying
C. looked about and hurrying
D. to look around and hurried
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