This performance has been achieved in the most toughest market conditions we have seen for many years yet.( )
举一反三
- We（）on it for many hours but we have not yet reached any concinsion. A: work B: have been worked C: have been working D: are working
- We ______ on it for many hours, but we have not yet reached any conclusion. A: are being worked B: are working C: have been working D: have been worked
- We half an hour for the bus, but it has not come yet. A: have waited B: are waiting C: had been waiting D: have been waiting
- No conclusion has been（） yet. A: achieved B: reached C: attained D: arrived
- Nowhere ______ so many people planting trees. A: have we seen B: we have seen C: have seen we D: we saw