Most of her spare time ______ , she still kept on her research in the laboratory.
I would rather buy a house in the suburb than ____ in the city.
I _____ on a sofa because my grandparents have come for the weekend.
____ you want to remember its usage, you’d better make a sentence with the new word.
Of the two, I would prefer ____ camera, which is very easy for me to carry.
----Did you happen to see ____ black and ____ white cat? ----Is she missing? I told you to take care of her.