At the end of the year 2010, some species of birds ddn’t survive the _____ winter in some European countries.
.—What do you think made hi m so excited? —_________a scholarship to Harvard, I suppose.
He is _________to staying up late and getting up late.
None of us was good at swimming, so the crossing of this dangerous river was really a_________.
Sometimes_________good knowledge of_________ first aid may mean the difference between life and death.
-- I will take part in the English lecture competition next week. -- ________.