The researchers found clear and convincing evidence ________ happiness is the key when it comes to better health and longer lives.
| A．where | B．whether | C．how | D．that |
--- It is said that Mary’s father is very rich .
--- ___________ She wouldn’t accept his help even if it were offered
| A．No doubt | B．What for | C．So what | D．No wonder |
Your story is perfect ; I’ve never heard ___before.
| A．the better one | B．the best one |
| C．a better one | D．a good one |
If we ________ now to protect our mother river ---Li Jiang River , we ‘ll live to regret it.
| A．haven’t acted | B．won’t act |
| C．don’t act | D．hadn’t acted |
Only after Mary read her article a second time _____the spelling mistakes.
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
--- Tom , why didn’t you answer my call yesterday afternoon?
--- Sorry , I didn't hear the phone . I ___________ asleep.
| A．must be | B．must have been |
| C．could be | D．should have been |