We cannot do all the things well, because each man has his ________.
A. limitations
B. margins
C. restraints
D. boundaries
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You are wanted _______ the phone.
A. on
B. by
C. through
D. down
These insects can ________ the color of their surroundings.
A. take out
B. take on
C. take off
D. take up
The gun ________ and the bullet went flying over his head.
A. went on
B. went over
C. went off
D. went for
Surgeons have successfully ________ an artificial knee-joint.
A. planted
B. implanted
C. fabricated
D. manufactured