the question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft Dthe question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft D.whether it is safe

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the question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft Dthe question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft D.whether it is safe
the question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft D
the question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft D.whether it is safe

the question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft Dthe question is --- to land on the grassland A.if it is safe B.if is it safe C.whether is it saft D.whether it is safe
选D
只有引导宾语从句时,IF和WHETHER是可以通用.
主语或表语从句只能由WHETHER引导,IF 不可以的.但IF还可以引导条件状语从句.

D

D
接让步状语从句
像这样:
The question is whether he can do it.
问题是他能不能做.

The question is simple 还是The question is simply The Question Is What Is The Question 歌词 The,question,is,easy,to, the question is quite difficult__ the answer to the question is t------- out of the question good service is out of question The,question,is,easy,to,answer The question is _ to answer.(easy) it is out of the question the question is what 什么意识 What is the right question now? The question is ____(他们会来吗)? Your k___ to the question is wrong It is out of the question. Walking is out of the question是什么意思? What is the question on your peaper? The question is ______ than that one. Is it yuor a---- to the question?