---How did you work out the difficult chemistry problem?--- I worked it out by ________.
#49667
A
working with a group
B
think very hard
C
ask the teacher for help
D
doing oneself
推荐题目
My friend is ______her sister.
#50081
A
babysitting
B
babysits
C
babysiting
D
to babysit
The baby stopped     and began    . 
#50542
A
to cry, laughing
B
to cry, laughed
C
crying, to laugh
D
cried, to laugh
The doctor did what he could ___________ the kid.
#49829
A
save
B
to save
C
saved
D
saving
—Don’t forget      your homework here tomorrow. —I     .
#48525
A
to bring ; won’t
B
to take; won’t
C
bringing; don’t
D
taking; don’t