To invent a new kind of electric light, Thomas Edison did lots of ____.
Money is important ,________it can’t buy everything.
There are ________ people in the supermarket. It's so crowded.
The Internet is very useful for us. We canfind information.
—Excuse me,sir. The shoes are a bit small for me. —Don’t worry. I’ll change them for asize
—How many students are there in the classroom? —_________. They are all in the lab.