单项选择题

If headaches only occur at night, lack of fresh air is often the cause.

A. deliver
B. fall
C. happen
D. arrive
<上一题 目录 下一题>
热门 试题

单项选择题
The policeman wrote down all the particulars of the accident.
A. secrets
B. details
C. benefits
D. words
单项选择题
About one million Americans are diagnosed annually with skin cancer.
A. every year
B. severely
C. actively
D. every month
相关试题