He will come to understand your efforts sooner or later. It’s just a matter of _____.
It is reported that the scientists in our country are_______all possible way to control H7N9 flu.
The _______of our life has been improved greatly since the Party’s policy was carried out.
Because of the recent bad weather, the work is several weeks behind_______.
--- What should I wear for my former boyfriend’s birthday party? --- ________. We’re already late!
There are two buildings in our new school, ________ stands nearly a hundred feet high.