---________by the chemistry teacher for not finishing homework independently makes him feel very shameful.---Yes. But he told me this morning he would spare no efforts to be the top one in our class.

This year the number of the US students ____in China has increased by 18.4percent compared to last year.

 The officer gave orders that anyone_____ a gun should be reported to the police station.

___ in London, the penniless American wandered on the pavement, ___ to find a job to make a living.

He was busy writing a story, only _____once in a while to smoke a cigarette.