—We usually go hiking for vacation. I like it, but I want to try something more challenging this year.—_____
What on earth did you tell her? The_____on her face suggested that she was very angry.
Rather than________in the city, the old man would prefer______in the count、ryside.
People in the west make_____a rule to buy Christmas presents for their relatives and friends.
A number of students ____ seen the film. That is,the number of the students who have seen the film____ large.
you understand this rule, you’ll have no further difficulty.