人教版2017-2018学年七年级英语下Unit 4单元检测

一、单选题

1. 难度：中等

I think English is         useful language, and it’s also         important language.

A. an, a    B. a, an    C. an, the    D. a, the

2. 难度：中等

Please listen ____ the teacher carefully (认真).

A. to    B. on    C. at    D. of