Before the first nonstop flight made in 1949,it______necessary for all planes to land for refueling.
| A．would be | B．has been | C．had been | D．would have been |
They________have arrived at lunchtime but their flight was delayed.(2011·全国 )
| A．will | B．can | C．must | D．should |
—Must I turn off the gas after cooking?
—Of course.You can never be ________careful with that.
| A．enough | B．too | C．so | D．very |
________Tom to be fit for the office, the boss________taking him on.
| A．Consider；considered | B．Considering；considering |
| C．Considering；considered | D．Considered；considering |
The company is starting a new advertising campaign to ________new customers to its stores.
| A．join | B．attract | C．stick | D．transfer |
—How about eight o'clock outside the cinema?
— That ________me fine.
| A．fits | B．meets | C．satisfies | D．suits |