I don’t know the reason _______ you were absent from the meeting, and I am not sure that someone will tell me the reason _______ you haven’t told me.
Take this medicine and get some sleep, and you will feel better; but if the pain continues, you'd better______ your doctor immediately.
--- I've quit smoking already, dear. --- You should have taken the doctor's advice years ago.______ ,anyway.
Nobody should ______ our fate. Instead, we should take a positive attitude to the present situation.
He is likely to be the only American hip hop artist ______ in China.
______ for his strong will as well as the doctor's careful treatment, he ______ till last year.