My study of maths has ____ much of my time, but it has given me a great deal of enjoyment.
He is a foreigner and he is not _______like that while he is in China.
He knows it is high time that he ________ at once.
I like_________ when the teacher says that my work is satisfactory ________.
Some of the exercises appear to be ___ ones that you have done, but after taking ___ second look, you will find that they are different.
---Oh, no,where is my purse? --- _______! You will find it sooner or later.