Why do you stand watch the milk _______over.
A. boiling B. boiled C to boil . being boiled
I know a little bit about Italy as my wife and I ________ there several years ago.
| A．are going | B．had been | C．went | D．have been |
By the time he realizes he ____into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．has walked | D．had walked |
The wet weather will continue tomorrow, when a cold front ______ to arrive.
| A．is expected | B．is expecting | C．expects | D．will be expected |
By the time he realizes he ____ into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．has walked | D．had walked |
--- I’m sure Andrew will win the first prize in the final.
--- I think so. He ___________ for it for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |