It is generally believed that constant reading andcomprehending can ______ our mental ability of comprehension while physicalexercise can help build up our body.

Last summer holiday, I went back to my hometown, _____ the neighbours and the house _____ I used to be familiar with were gone. [ ]

Do you mind my sitting here —___________ .

I often go to the English corner to have a free talk with my classmates ________I am busy[ ]

is expected, according to the online survey, is that housing prices can’t go up any more.