My mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it.
- I hear that Jason is planning to buy a car. -- I know. He _____ enough for a used one by next momth.
Television has many advantages. It keeps us ____ about the ___ news and also provides entertainment in the house.
Is there a certain cure ___ lung cancer yet?
-- Can I call you back at two o'clock this afternoon? -- I'm sorry, but by then I ____ to Beijing. How about five?
The little boy was allowed to go to have a swim _____ he finished his homework.