23. Failure as he has been in his previous attempts, he still sticks _________ the research aimed _______ increasing production.

The six­year­old girl infected with the H7N9 bird flu is in a ________ condition after receiving treatment.

You’d better anorange coat when you take part in the exam. It may .

ry exact and particular, which could help readers to break the language sodirectly and effectively

Is Mr Wang in?—Sorry，he ________ lives here He has moved