单选题：Backpacks with wide, padded straps and a belt can help to a

题目内容：

Backpacks with wide, padded straps and a belt can help to avoid problems of sprains and strains. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

We were shocked to find that Mary didn't know her guest's n

We were shocked to find that Mary didn't know her guest's name.A．frustrated B．d

分类：卫生类题型：单选题

Loud noises can be annoying.A．hateful B．painful C．horrifying D．irritating

分类：卫生类题型：单选题

Jack consumes a pound of cheese a day.A．eats B．drinks C．buys D．produces

分类：卫生类题型：单选题

The study has posed a question about this nature.A．supported B．cancelled C．arous

分类：卫生类题型：单选题

The drinking water has become contaminated with lead.A．polluted B．treated C．test

分类：卫生类题型：单选题