Question

The teacher ______ several times, but he still didn’t understand it.

1. A.
   explained John the sentence
2. B.
   explained the sentence for John
3. C.
   explained to John the sentence
4. D.
   explained about the sentence to John

Answer 1

C
這題考查詞組：explain to sb sth“向某人解釋”，句意是：老師向約翰解析了幾次句子，但他還是不理解。選C。