. My first summer vocation in the high school, _______I spent a fortnight on the farm, is really unforgettable.
In the face of ________ failure, it is the most important to keep up ________ good state of mind.
Sheep on a remote Scottish island are gradually shrinking _______ global warming, according to a study published in the journal Science.
The long absence of rain _______ leads to a serious drought in the southwest of China, which draws the concerns of the whole country.
.Over 800 pages of the earliest surviving Christian Bible have been recovered and made _______ on the Internet.
She was _______whether to follow her husband to go abroad or to stay at home to look after her parents.