Rejecting the urging of his physician father to study medicine, Hawking chose to ________ on math and theoretical physics.
A.impose
B.center
C.overwork
D.concentrate
正确答案是D
Rejecting the urging of his physician father to study medicine, Hawking chose to ________ on math and theoretical physics.
A.impose
B.center
C.overwork
D.concentrate
正确答案是D