We all know that paper burns in  _________ .
#34913
A
CO2
B
N2
C
O2
D
CO
推荐题目
Susan is ____ to come and see me this Sunday evening.
#20660
A
possible
B
likely
C
impossible
D
scarcely
If you win the competition, you will be given ____ to Europe for two.
#20559
A
a free 7-day trip
B
a free trip for 7-day
C
a 7-day free trip
D
a trip for 7-day free