It is doubtful______the work can be completed on time.A．ifB．whyC．thatD．when

It is doubtful______the work can be completed on time.

A．if

B．why

C．that

D．when

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

It is doubtful whether anyone can be a truly ______ observer of events.A．inadequateB．impas

答案解析
It is advisable that the working mother______a balance between work and family life.A．make

答案解析
I am doubtful whether I can solve the puzzle, but I ’llhave a ____ at it.A) shootB)

答案解析
The ratio of the work done by the machine______________the work done on it is called the

答案解析
It is advisable that the working mother______a balance between work and family life.A.make

答案解析
A: Must we finish the work right now?B: No you _______. You can do it tomorrow.A.needn

答案解析
His honesty is _______ nobody can doubt it.

答案解析