—__________ do I have to change the robot’s batteries? —Every two months.
Last night, the wind blew so _____________ that some roofs were blown away.
—What’s the low-carbon life style like?—Save __________ energy, produce __________ carbon.
—Have you found your bicycle?—No, I haven’t. But my parents promised to buy a new ________ for me.
This year is the Year of the Rabbit. We Chinese use 12 different animals to stand for the _______ of our birth years.
A terrible earthquake happened in Japan __________ 13:46 pm, March 11, 2011. It killed thousands of people.