Normally， a forest fire and the damage _______ causes can be very extensive， especially when you consider the financial and physical losses．

It is reported that between the year 1550 and 1950 about one kind of living things___each year

She listened with a________expression on her face,which suggested she didn’t completely understand.

quantities of water, as well as some other timely help including a medical team ___since the serious drought hit Yunnan Province.

Progress so far has been very good _____, we are sure that the project will be completed on time [ ]