问题
选择题
You have to wear special clothing, a helmet and a life jacket ____ your raft gets turned upside down or sinks.
A．so that
B．in order that
C．now that
D．in case
答案
Ｄ
短语辨析。A. 以便；所以 B. 为了；以便 C. 既然 D. 万一；假使。句意：万一你的木筏翻了或者沉底，你必须穿上特殊的衣服，一个头盔和救生衣。选D。