___ the temperature might drop, coal was prepared for warming.
A．To consider B．Considered C．Considering D．To be considered
We had a really bad time about six months ago but now things are ____.
A．looking up B．coming up C．making up D．turning up
--- The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
---____ my students have a try?
A．Shall B．Must C．Will D．May
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
A．if never B．if ever C．if not D．if any
Encouraged by my science teacher, I set about my studies on developing my product, _____I hope I will succeed in applying for a patent（专利）.
A．with whom B．to whom C．through which D．for which
The main reason why Apple’s products always manage to capture the imagination of people worldwide is their attention to _____. Each and every part of an Apple product is perfect in its body.
A．details B．functions C．features D．trends
