We had built three bridges over the river _______ the end of 1994.
Many experts think pigs are ______ to train than dogs or cats.
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) _______.