问题
It’s kind __________ Yao Beina to donate her corneas (眼角膜) _________ three people in need.
A:clean
B:cleaning
C:to clean
D:cleans;
B:cleaning
C:to clean
D:cleans;
正确答案是：
同类题型
.______ he can finish his task on time is of greatimportance.
If you don’t know what this means, ________ the dictionary.
Every possible means ________ to prevent the air pollution，but the sky is still not very clear.
If you_____ a mistake in reviewing the report, please bring it to my attention.[ ]