Children will work actively if _______. 
#68018
A
praise
B
praised
C
praising
D
to praise
推荐题目
---How long have you been studying at this school? --- I have been studying here­­­­____.
#41315
A
since I was thirteen years old
B
when I was thirteen
C
at the age of thirteen
D
after I was thirteen
The number of the people who _______ cars _______ increasing. 
#73754
A
owns; are
B
owns; is
C
own; is
D
own; are