用括号内所给动词的适当形式填空（do,sing,not have,give,help,play,study,have,c

用括号内所给动词的适当形式填空
（do,sing,not have,give,help,play,study,have,come,visit)
1.I ( ) computer games when the telephone rangt
2.While the boys ( ) in the classroom,someone knoched at the door
3.They ( ) the Summer palace last Saturday
4.The boy ( ) me a nice watch yesterday
5.They ( ) breahfast at that time
6.---What were you doing at seven yesterday evening?
---I ( ) for a test
7.Lucy ( ) breakfast at home yesterday morning
8.Mary ( )her mother with the housework this time yesterday
9.( )he( ) to see you last Saturday
10.My mother ( ) the washing when I came back