—What are your two sisters doing?—They ______ TV.
—It’s difficult to get to the other side of the river. —I think a bridgeover the river.
Li Na is famous all the tennis fans in China know her.
More and more people have a low-C life and the air is getting much ___ than a few years ago.
—do you know so much about the UFO? —I usually get the information by surfing the Internet.
—Which of the two T-shirts will you take? —I’ll take. One is for my brother and the other is for myself.