Question

【题目】—_______ sleep do you think is necessary for a Grade 9 student? — 8 hours at least.

A. How often B. How long C. How many D. How much

Answer 1

【答案】D

【解析】

试题句意：你认为对于一个九年级的学生多少睡眠是必要的。至少八个小时。A. How often 多久一次B. How long 多久 C. How many多少，加不可数名词D. How much 多少，加不可数名词。sleep,不可数名词，故选D。