Question

Small sailboats can easily turn over in the water ______ they are not managed carefully.

A. though
B. before
C. until
D. if

Answer 1

答案D
状语从句连词的选用。根据前后句的逻辑关系，空格内应填if引导条
件状语从句。句意：“小帆船如果不小心驾驶，也会容易翻。