92. It was good ______ you to invite me to join in the party.

93. The diligent student refused the help of others and insisted on working out the difficult maths problem _____.

94. If you don’t believe me, you’d better go to have a look at it _____ person.

95. The scooter(滑板车) has been popular _______ a lot of children since the year before last.

96. It is reported that the thirty-ninth president of America Jimmy Carter has won the Nobel Prize _____ peace in the year of 2002.

97. When he was in America, he made a journey of seven hundred miles _____ purpose to get a glimpse of the Niagara Falls.

98. We have friends ____ the world.

99. If you study harder, you will catch       the others in the class. 

3. —How long are you staying there?

— _____depends.

5.Is ____ necessary to complete the design before National Day?