Cataracts is a kind of illness that ______.
A. must lead to blindness
B. can not be treated by operations
C. can be cured
D. can change the color of eyes
【B11】
A. what
B. who
C. where
D. which
【B8】
A. kind
B. sort
C. race
D. type
The author's purpose in writing this passage is to ______ the villa.
A. advertise
B. criticize
C. produce
D. ensure
微信支付 
支付宝支付