— She is too busy to help us finish the work.— Let’s do it ________.
Young people think it _____ great fun to surf_____ Internet.
The teacher asked the students.
Alow-carbon(低碳)lifestyle has an effectour daily life.More and more attention has been paid toEnergies these days.
The teachers _________ the office for a few minutes when we arrived.
---Mum,_______ I watch TV? ---No. Unless your homework _______________.