Thank you for  _____ us so much help. 
#51344
A
giving
B
give
C
to give
D
gives
推荐题目
Lucy is shy. She would not invite her classmates _____dancing with her.
#49280
A
practice
B
practices
C
practicing
D
to practice
The workers were made ________for ten hours a day.
#51045
A
work
B
worked
C
working
D
to work