Question

【题目】Johnson won't answer the phone if he ________ the number.

A. knew B. doesn't know C. will know D. didn't know

Answer 1

【答案】B

【解析】句意：如果约翰逊不知道电话号码，他就不接电话。考查动词时态。本句是if引导的条件状语从句，当主句是将来时态时，从句用一般现在时，可排除C、D两项。根据句意，本句是否定陈述，故选B。