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 |
Life is like a ling race we compete with others to go beyond ourselves.
| A．why | B．what | C．that | D．where |
I was born in New Orleans, Louisiana, a city name will create a picture of beautiful trees and green grass in our mind.
| A．which | B．of which | C．that | D．whose |
She brought with her three friends, none of I had ever met before.
| A．them | B．who |
| C．whom | D．these |
Many children， parents are away working in big cities，are taken good care of in the village.
| A．their | B．whose |
| C．of them | D．with whom |
Mary and I see each other ________, but not as often as we used to. 21世纪教育网
| A．sooner or later | B．once in a while | C．in the end | D．more or less 21世纪教育网 |