My car runs as fast as,if not faster than,a race

My car runs as fast as,if not faster than,a race his car runs as fast as ,if not faster than ,a race car这句话如何 His car runs as fast as if not faster Who is running （ ）than Mike?A、fast B、slow C、as faster as D、a my sister runs as _____(fast)as my brother Tom runs fast.Jack runs faster than Tom.(合并成一句) Who runs as fast as Tom ______? A dog runs(fast,faster,fastest)than a duck.(把正确的词圈出来) When can you go as fast as a racing car When do you go as fast as a racing car? 怎样理解 He runs as fast as wind.He runs as wind as fast. My radio is as good as,if not better than ,Anne's