—A ruler is 2 dollars and a pen is 3 dollars. How much are they? —They are ________. 
#51074
A
$2
B
$3
C
$4
D
$5
推荐题目
--What’s three and two? --It’s________.
#51681
A
One
B
two
C
three
D
five
There are ______visitors in Hangzhou every year.
#51629
A
million of
B
millions of
C
million
D
milliones of
I’m ____ heavier than my brother. 
#51481
A
a few
B
few
C
a little
D
little
It is reported that _______ people in the world are suffering from the H1N1 flu.
#51225
A
ten thousand of
B
ten thousands
C
thousands of
D
ten thousands of