1.All flights _B_because of the storm ,they decided to go to Beijing by train.
A having been canceled B had been canceled C having canceled D were canceled
解析:因為航班的取消這動作在他們下決定坐火車去北京之前,所以選擇過去完成時態(tài).
翻譯：所有的航班因為暴風(fēng)雨取消了,他們決定坐火車去北京．
2.We shall have completed the work by the time he _B___ back next week .
A will come B comes C is coming D will have come
時間狀語從句,從句用一般現(xiàn)在時表示將來.
翻譯：我們應(yīng)該在他下星期回來前把工作都完成．
3.The little girl __A_ into the lake but her father caught her.
A would have fallen B should have fallen C had probably fallen D has fallen
對過去的虛擬語氣用法,而should have fallen 表示本應(yīng)該掉下去,不符合邏輯,只能選擇A.
翻譯：小女孩沒有他父親及時抓住她的話會掉進河里．
4.---“Do you often swim now ”
-----“No,but I _C___ when I was in my fifties .”
A used to B am used to it C used to do D was used to doing
解析:used to do 的意思是,過去常常做某事,而現(xiàn)在不做了
be used to doing /sth 是習(xí)慣于（做）某事 的意思
be used to do被用來做某事
翻譯：＿你現(xiàn)在還常游泳嗎?
＿沒有了,但我50歲時常游泳．
5.A new computer costs about _D____ of this used one .
A the three times price B three time the price C three times a price D three times the price
解析：A is three times the size／price of B句型
翻譯：一臺新電腦的價格是二手電腦的3倍．