Scientists also have no idea how long it will be before all wild animals in the cages _____.
| A．should be set free | B．will be set free |
| C．are set free | D．would be set free |
-- Which do you prefer, oranges or apples? -- __________ . I' d like bananas.
| A．Yes, both | B．Neither, thank you | C．Sure, I would | D．No, please |
-- Oh, no, we've missed the 8 o'clock train!
--________ . There's another one in half an hour.
| A．You're right | B．That's all right | C．You're welcome | D．Don' t worry |
--_______________? -- Orange, I think.
| A．What is it | B．How is the food |
| C．What colour do you think it is | D．Is there any fruit around here |
-- Hello! Is that Mr Wang speaking? --Yes,____________?
| A．who' s that | B．who are you | C．I' m speaking | D．I' m Mr Wang |
-- Is Mr Smith really very ill? --________. He's in hospital.
| A．I don't think so | B．No, he isn't | C．I hope so | D．I'm afraid so |