—Do you know that some new types of energy _____ very little and never run out?—Yes, I agree.
—What is your brother like ? —_________
--- Do you mind telling me how to use the function? --- , It is very easy.
If your homework , you can watch TV.
---Good news! A new educational CD-ROM has just come out!---Great! I’d like to study and play_______________.
I haven’t seen you ____________.