Hurry up , or you ________ catch the train.

Thethief______whenhewasstealingawalletfromawoman

It is said that the gravity on Mars is only about __________ of the gravity on earth．

Chinese speed skater, Li Jianrou was a dark horse. She to win the gold medal before the race started.

The old man __________ in Tibet for two years as a volunteer teacher；it is an experience he often mentions