By the time we arrived at the railway station, the train _________. As a result, we missed the train.
When was it _____ your parents took you to Hangzhou?
It is everyone’s duty to ______ our school a pleasant place to learn in.
Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company .
______ me the truth, or I’m not going to leave the room.
It is said that the weather will ______ hot for another three or four days.