Question

一道英语选择题 高中 急

At first we were quite ______ as to the object of his trip,but now we see it quite clearly.
A.by sea B.at sea C.by air D.on the air
为什么 ？？

Answer 1

选B。因为意思是一开始我们对他旅行的目的不清楚，但是现在我们很清楚的明白了~
by sea: 乘船
例句与用法:
1. I'm terrified of flying I'd rather go by sea.
我害怕坐飞机--我宁愿坐船.

2. May I ask if you are fond of traveling by sea?
我可以问一下你是否喜欢海上旅行？

3. All the villagers took to the boats to defend their island against the attackers arriving by sea.
全体村民上了船，抵抗海上的来犯者，保卫他们的海岛。

4. An area of open water surrounded by sea ice.
冰间湖由海水冰围成的一块开阔的水域
at sea: ad. 离开陆地(茫然)
例句与用法:
1. He felt completely at sea in his new school.
他在新学校中感到茫然不知所措。

Answer 2

选B.
因为只有B有 茫然、迷惑的意思，其他的都没此意思。