The equipment _____ out of order, the experiment has to be put off.
A: has been
B: being
C: is
D: be
A: has been
B: being
C: is
D: be
举一反三
- The monitor（）ill, we'd better put the meeting off. A: is B: has been C: been D: being
- The monitor ______ ill, we'd better put the meeting off. A: is B: B. has been C: been D: D. being
- ______ a rainy day, we'd better put the picnic off and stay at home. A: It was B: It is C: It being D: It has been
- The lifeboat ______in case it is necessary to take off the crew of the damaged ship. A: has been put aside B: has been put away C: has been set aside D: is standing by
- The project requires more labor than____because it is extremely difficult. A: have been put in B: to be put in C: has been put in D: being put in