Working hard is not only a _____ of great success, but it is among the essential requirement.
#5107
A
sign
B
singal
C
guarantee
D
expectation
推荐题目
Niagara Fall is a great tourist ________, drawing millions of visitors every year.
#5804
A
attention
B
attraction
C
appointment
D
arrangement
The _________ on his face was kind of strange, when I told him the news.
#6425
A
appearance
B
looking
C
expression
D
description
A landing on Mars is within the _____ of current physical theory.
#6916
A
scheme
B
scope
C
scrap
D
scale