Question

________ does Lin Feng usually clean the floor of his own bed-room?

Once a week.

[　　]

A．When

B．What day

C．How long

D．How often

Answer 1

答案：D
解析：

答案选“D”。英语中要表示“多久间隔”发生一动作的提问时常用How often结构，回答时常用： once a month，twice a day，every week，sometimes，always，never等时间状语。而 How long常用来就表示持续性时间状语提问的。意为“持续、延续多久”。 　　1)—How often does your mother come to see you? 　　你妈妈多久来看你一次？ 　　—Often . /Sometimes . / Once a week . 　　经常/有时/每周一次。 　　2)—How often was he late for work last season? 　　上季度他迟到过吗？ 　　—Never. 从来没有。 　　3)—How long have you been in the army? —Nearly ten years . 　　你在部队服役多久了？近十年了。