题目内容

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

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

查看答案

搜索结果不匹配？点我反馈

更多问题

The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.

A. after
B. before
C. since
D. when

Leave your key with a neighbor ___ you lock yourself out one day.

A. ever since
B. even if
C. soon after
D. in case

You will be successful in the interview you have confidence.

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

有7个队参加的团体比赛，如果采用单循环赛方式进行比赛，那么比赛需要打：

A. 6轮21场球。
B. 7轮42场球。
C. 6轮42场球。
D. 7轮21场球。