One way for students to prevent H7N9 flu virus is to open the windows of the classroom to allow the air to ________.
#13540
A
accumulate
B
circulate
C
illustrate
D
accelerate
推荐题目
When my grandfather retired(退休) at the age of 60, he took a sea ________ around the world, which had been his dream since his childhood.
#12229
A
travel
B
trip
C
voyage
D
journey
— How are you, my dear?— Not so well． I've ___ the flu．
#13586
A
looked up to
B
dropped in on
C
come down with
D
gone in for
I tried hard to get some information about the new technology out of his mouth, but he remained_________．
#14423
A
quiet
B
secret
C
silent
D
calm
The girl being a child of _______ intelligence, expecting too much of her would make her nervous.
#14279
A
average
B
slight
C
strange
D
different
We are using so many raw materials every day, which _______ that they _______.
#13669
A
are running out ; will be used up
B
are being run out; will run out
C
have run out of ; will be using up
D
have run out; will run out of