_______ is the most useful invention?
| A．Do you think which of these | B．Which of these do you think |
| C．Which of these you think | D．You think which of these |
It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
| A．caused, realized | B．had caused, realized |
| C．caused, had realized | D．was causing, had realized |
I would appreciate ____ if you could give me a lift.
| A．you | B．that | C．one | D．it |
Mary ____ at school wearing a T-shirt with some slogans.
| A．broke up | B．came up | C．ended up | D．turned up |
East of our school ____ two companies _____ make electric motorbikes.
| A．are, that | B．is, where | C．is, that | D．are, where |
How long do you think ____ the car factory launches a new model?
| A．will it be until | B．it will be before | C．will it be when | D．it will be that |