从方框中选择恰当的单词完成句子if，unless1．Youcan'timproveyourspokenEngl...

问题详情：

从方框中选择恰当的单词完成句子

1．You can't improve your spoken English ______ you practice it every

day from now on.

2．There will be fewer cars in the city______ people choose the

subway.

3. Life is like a mirror. ______ you smile at it, it will smile back.

4. I will be very happy ______ you come to my party.

【回答】

1. unless　2. if　3. If　4. if

知识点：连词

题型：完成句子