He has been on a ________________ to help end Lebanon's political crisis.
举一反三
- The present crisis is much less a political than an economic crisis.
- He __________ you more help, but he has been so busy
- He has been very (help) to me in the past and I hope he will be so in the future.
- Even if he()here, he would not be able to help us. A: is B: had been C: has been D: were
- How long has he been an auctioneer? A: He’s been an auctioneer for 33 years. B: He’s been an auctioneer for 13 years.