欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

The new generation of computers, with artificial intelligence, _______and perfected now.

The new dictionaries are very useful. They _______ well and _______ already.

With more forests being destroyed in that area, huge quantities of land _______ deserts each year.

The first few years in the 21st century ______ the rapid rise of China as a world economic power.

She told me that she would not go with us if it ____ the next day.

----My car broke down yesterday on the way to the Yue Lu mountain.
----I am sorry to hear that, but you _______that car every day for ten years before it broke down. Now you really need to buy a new one.
A. have used      B. have been used    C. had used     D had been used

---- What were you doing when Tony phoned you?
---- I had just finished my work and _____to take a shower.

----The train will arrive at the station in half an hour. Who ______for us? 
----I am sure Dad will be standing there when we get off the train.

Although medical science________ control over several dangerous diseases, what worries us is that some of them are returning.?

—You seem to be familiar with this city．
—I       here for three years．It's great to be back．