Alow-carbon(低碳)lifestyle has an effect our daily life.More and more attention has been paid to Energies these days.
A.in;save B.in;saving C.on;save D.on;saving
The teachers _________ the office for a few minutes when we arrived.
A .had been away from B. had left
C. have been away from D. have left
---Mum,_______ I watch TV?
---No. Unless your homework _______________.
A. could; finishes B. can; will finish
C. may; is finished D. can; will be finished
__________terrible luck he had yesterday!
A. How B. what C. How a D.What a
Yesterday I met Jim. We ____________ each other since we _________ middle school.
A. haven’t seen ; finished B. haven’t seen; finishing
C. hadn’t seen; finishing D. hadn’t seen; finished
---When did you return to China?---_________________.
A. Until next week B. Not until next week
C. a few days ago D. for a few weeks
