Your phone ______ for several minutes now. Why don’t you answer it?
A. had rung B. rang
C. has been ringing D. was ringing
You can’t see things clearly through a telescope unless it is _____ correctly to your sight.
A. adjusted B. examined C. checked D. tested
It is said that many streets in this city have been ______ for cultural protection.
A. left out B. carried out C. marked out D. stood out
I tried to ______ Tom last night, but no one answered the phone.
A. call up B. call on C. call off D. call for
The ______ of air and water makes it impossible to live on the moon.
A. presence B. absence C. dependence D. evidence
— Have you seen Shirley since she moved away?
— Yes. I’ve seen her several times. She comes back to visit us ______.
A. at any moment B. from time to time
C. in no time D. sooner or later
