题目内容：

doubtfull在用法上与suspicious上的区别
I hope their plan will work,but they themselves are very ____
that it will.
A.condident
B.concerned
C.doubtfull
D.suspicious
请附加题干的翻译!

优质解答

C译：我希望他们的计划会奏效,但是他们自己对此都表示怀疑.析：“doubtful”和“suspicious”译成中文都是“怀疑”,但其用法是不一样的,“doubtful”表不确定之意,如“It's doubtful wheather he will win”而“susp...