【推荐1】______________________ are very important for language learning.  
说和听对语言学习非常重要。

【推荐1】In the following weeks, Sally worked out 10 class rules and posted them on the walls of the classroom. She ________ explained all the rules to the students and required everyone to follow them. （根据句意填空）

【推荐1】The old man was lying on the ground as if he was hurt badly.(状语从句的省略)
→The old man was lying on the ground as if ________________________________.

【推荐2】听起来好像汽车的引擎出了问题。如果是这样的话，我们最好马上把它送到汽车修理厂。
It sounds as if something is wrong with the engine of the car. ________   ________, we'd better take it to the garage immediately.