一般过去时习题1.The students were waiting for me when I _____ back.

一般过去时习题
1.The students were waiting for me when I _____ back.
2.When I _____ to the bus station,the bus had left.
3.I haven’t seen them since they _______from here.
4.I have been collecting the stamps since I ____ the first one as a gift.
5.Miss Hu said that we _____to beat the strongest enemies-ourselves.
6.He asked if he _____ stop to relax himself on Internet.