_______to improve the students’sight,  the eye exercises are done in schools nationwide. 
#94304
A
Being designed
B
To design
C
Designing
D
Designed
推荐题目
--- I’d like to buy an expensive sports car.----- Well, sir. We’ve got several models_______
#96975
A
to be chosen from
B
to choose
C
to choose from
D
for choosing
Nobody likes ______.
#97512
A
to speak ill of
B
to be spoken ill of
C
speaking ill of
D
spoken ill of