Question

Riding a motorcycle at ________ high a speed on ________ a crowded street is dangerous to everyone, including the motorcyclist himself．

1. A.
   so; so
2. B.
   such; such
3. C.
   so; such
4. D.
   such; so

Answer 1

C
本题要注意so+adj．+a(an)+n．和such a/an+n．的结构。第一空后虽然有名词speed，但它前面已有冠词a，而形容词high紧挨在空格后，所以应该用so来修饰。此处还可说成at such a high speed。