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
网友回答
A. so that
B. in order that
C. now that
D. in case
解析：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。