You have to your mother the housework.A、helps; to do B、helps; doing C、help; do
—Can you tell me _____________? —About two months ago.
Tom is really upset about losing the game, but I think he will ________ it soon.
While I ___________ TV, the bell rang.
Xu Qian is a funny girl. She loves to __________ jokes.
—How do you study English well? —__________ working hard.