_________ some mammals came to live in the sea is not known.

admin2010-01-15 16

问题 _________ some mammals came to live in the sea is not known.

选项 A、Which
B、Since
C、Although
D、How

答案D

解析 “HOW”引导的名词从句做主语。

转载请注明原文地址:https://kaotiyun.com/show/QUnK777K

专业英语四级

相关试题推荐

随机试题

最新回复(0)