We can never expect ________ bluer sky unless we create ________ less polluted world.(2009·安徽)
| A．a；a | B．a；the | C．the；a | D．the；the |
—I'm sorry for not having told you the news earlier.
—________.
| A．Enjoy yourself | B．Make yourself at home |
| C．It doesn't matter | D．Take your time |
________，the search engine just gave me some brief introductions rather than the whole content of the book to read.
| A．Luckily | B．Disappointedly |
| C．Funnily | D．Disappointingly |
The boy really has________good memory.He can write the content of the book from________memory.
| A．a；a | B．a；/ | C．/；a | D．/；/ |
________and short of breath，Andy and Ruby were the first to reach the top of Mount Tai.
| A．To be tired | B．Tired | C．Tiring | D．Being tired |
It is reported that many a new house________at present in the disaster area.
| A．are being built | B．were being built |
| C．was being built | D．is being built |