Tom is a promising student. I am sure th
题型:选择题
问题:
Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.
A.usual
B.constant
C.content
D.normal
Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.
A.usual
B.constant
C.content
D.normal