We can't put off ______a plan. Clean--Up Day is coming.    
#53458
A
make
B
to make
C
making
D
to making
推荐题目
___ study in No.4 Middle School? 
#57141
A
Did you used to
B
Did you use to
C
Do you used to
D
Do you use to
 All lights______after the students left the classroom.
#59425
A
went down
B
goes off
C
goes down
D
went off