-Excuse me, does Mr Smith’s son live here?-He _________ be here, but he has moved.
My father has a habit of jogging ________ the Dongcheng River for an hour in the evening.
It is said that the terrible weather will ________ for another week.
Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.
Poor Tim is too nervous to start his speech. Someone should remind him________.
Make a list of the things you want to buy. ________, you will surely forget some of them.