You  have to wear a helmet and a life jacket fo Wap版

试题详情及答案解析

You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.

A．in case	B．unless
C．though	D．as

答案：A

试题分析：句意是：你不得不戴头盔穿安全服，以防万一你落在水里面。in case 以防万一； unless 除非； though 尽管；as由于，故选A
考点：考查状语从句。