–What’s that noise?
–Oh, I forgot to tell you. The new machine ______.
A. was tested B. will be tested
C. is being tested D. has been tested
A number of books in the library _______ been stolen so that the number of them ______smaller than before.
A. have; is B. has; is C. has; are D. have; are
The growing speed of a plant is influenced by a number of factors, _____ are beyond our control.
A. most of which B. most of them
C. most of what D. most of that
It is usually warm in my hometown in March, but it _____ be rather cold sometimes.
A. must B. can C. should D. would
I have reached a point in my life _____ I am supposed to make decisions of my own.
A. which B. where C. how D. why
You will be successful in the interview ______ you have confidence.
A. before B. once C. until D. though
