Question

3. ________to the left , you'll find the post office . 5. ________to the left , and you'll

3. ________to the left , you'll find the post office .
5. ________to the left , and you'll find the post office .
A. Turning B. To turn C. Turn D. Turned

为什么选A 和C ？？ 在句中做什么成分？
从句加个and 有什么区别？？

Answer 1

3. A
分词短语作条件状语
5. C

第五题,这是
【祈使句， and + 陈述句（常用will + 动词原形）】句型

在这个句型中， 前面的祈使句表条件
如：
Work hard, and you'll catch up with him.
=If you work hard, you'll catch up with him.

如果条件部分带否定意味， 中间并列连词用or, 即：
【祈使句， or + 陈述句（常用will + 动词原形）】
如：
Work hard, or you won't catch up with him
=If you don't work hard, you won't catch up with him.