go on doing ,at the sane time,be neck and neck,catchup with,comeon

题目

go on doing ,at the sane time,be neck and neck,catchup with,comeon
1.( "the atudents in class3 shouted
2.They both finished their homework ( )
3Malili was in front ,but soon LimLim( )her
4Itwas difficult to say who won the girls'400meters ,because LiLing and Li Ping ( )
5.It was late night ,but he( )his homework

答案

1. come on
2.at the same time
3. catch up with
4. be neck and neck
5. go on doing