As we bumped over the dusty track, we swerved to avoid large boulders.The wheelsscooped up stones which hammered ominously under the car. We felt sure that sooneror later a stone would rip a hole in our petrol tank or damage the engine.

　　7.As we bumped over the dusty track, we swerved to avoid large boulders.

　　我们在尘士飞扬的道路上颠簸，车子东拐西弯，以躲开那些大圆石。

　　语言点:句子结构分析:as在此不是引导原因状语从句，而是引导时间状语从句，可以解释为“一边…一边…”。to avoid large boulders为动词不定式短语，作目的状语。

　　8.The wheels scooped up stones which hammered ominously under the car.

　　车轮搅起的石块锤击车身，发出不祥的锤击声。

　　语言点1:句子结构分析:which引导定语从句，修饰stones。

　　语言点2:scoope up的意思是“铲起，卷起”。

　　9.We felt sure that sooner or later a stone would rip a hole in our petrol tank ordamage the engine.

　　我们想念迟早会飞起一个石块把油箱砸开一个窟窿，或者把发动机砸坏。

　　语言点1:句子结构分析:that引导宾语从句，交代felt sure的内容。

　　语言点2:rip的本意是“撕开”，在此引申为“砸开”。