When something is on fire, people throw sand on it to put out the fire. The main use of the sand is to _________. 
#54333
A
protect the thing on fire
B
add weigh to the thing on fire
C
keep the air away from the thing on fire
D
lower the temperature of the thing on fire
推荐题目
Jane’s mother preferred __________ TV at home to __________ to the concert.
#61998
A
to watch; go
B
watching; going
C
watching; go
D
to watch; going
I          my homework at home this morning.
#61691
A
forgot
B
have forgotten
C
leave
D
left
You made many mistakes in your English exams. What will you ___them?
#54975
A
help with
B
do with
C
take with
D
bring with
Those__________ my parents.
#59325
A
am
B
is
C
are
D
Can