Question

The teacher showed ________ the test.

1. A.
   to do
2. B.
   how to do
3. C.
   what to do
4. D.
   in which to do

Answer 1

B
思路分析：show，teach，know等動詞通常不直接跟不定式作賓語，但可跟“疑問詞+不定式”作賓語．此空應(yīng)填how to do，副詞how在不定式中作方式狀語．