2. 外语
  3. Having a trip around the country is certainly good for the old couple, but it remains______ whether they will enjoy it.

Having a trip around the country is certainly good for the old couple, but it remains______ whether they will enjoy it.

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问题 Having a trip around the country is certainly good for the old couple, but it remains______ whether they will enjoy it.
选项 A、to see
B、to be seen
C、seeing
D、seen
答案B
解析 it remains to be seen为固定用法，意思为“尚不确定，说不准"，but后面的分句是一个含有主语从句的复合句，it为这一复合句的形式主语，真正的主语为whether they will enjoy it，故答案为B)。
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