What really worries us is the explorers can accurately locate themselves with the device

发布时间：2020-08-16 18:07:12

What really worries us is      the explorers can accurately locate themselves with the device in case of bad weather.
A. that
B. where
C. what
D. whether

网友回答

A. that
B. where
C. what
(答案→)D. whether
解析：本题考查名词性从句。题中为表语从句，且为一般疑问句，故用关系词whether，选D。
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