The World Health Organization has given some advice on        to protect us from being infected(感染) with H7N9.
#45384
A
how
B
what
C
where
D
when
推荐题目
 I think Tara works as    __ as Tina. 
#45334
A
harder
B
hardest
C
hardly
D
hard
—Are you _______ to go hiking with us?— Yes, I _______.
#46327
A
good enough; good
B
well enough; think so
C
enough good; think so
D
well enough; am good
It’s very ____________ to play ____________ football with them.
#47683
A
pleasure, a
B
pleased, the
C
pleasant; /
D
please; an