— ______ do you usually come to school?--- ______ bike.
Which sign can you probably see in the supermarket?
—Can I get you a cup of black coffee?—______.
—I prefer at home on such a rainy day. —So do I.
A low-carbon(低碳) lifestyle has an effect our daily life. People are paying more and more attention to energies these days.
These pictures will show you____.