【单选题】What do some scientists say about taking medicines for the common cold according to the passage?
A.
It is good for people.
B.
It actually does more harm than good.
C.
It can help people keep healthy.
D.
It can give them more energy.
【单选题】— Can I have _____________ envelope and some _____________? — Sure, here you are. [ ]
【单选题】Some people viewed the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remains______ .
【单选题】------How do you like the film we saw yesterday ? ------________, I am pleased with it though some parts are boring.
【单选题】Where do people shake their heads in a rotating movement to signify agreement?
A.
In some parts of the Western world.