Our teacher warned us ______ play tricks _____ others.A. to; at B. not to; on C. not to; to
Five _______ students from different schools took part in the English contest last Saturday.
Many scientists say that it’s important for us to have ______ food in our diet.
It is no doubt that Liu Xiang is _______ favorite star.
I telephoned Jane just now, but she wasn’t in. I has to leave her a(n) _______.
In the United States, Father’s Day is on _______ third Sunday in June.