---Which way do you prefer, reading online or reading on paper? --- . Sometimes I read online, sometimes I read on paper.
The teachers _________ the office for a few minutes when we arrived.
---Mum,_______ I watch TV? ---No. Unless your homework _______________.
__________terrible luck he had yesterday!
Yesterday I met Jim. We ____________ each other since we _________ middle school.
---When did you return to China?---_________________.