I can't imagine therebe a shortage of water in Yunnan, the southwest of China where thereused to be adequate rain.A. could B must C. might D. should
This area experienced ____ heaviest rainfall in ____ month of May.
We offered these students a summer course ,aimed _____ improving their spoken English.
--I can't find John .Where did you meet him this morning? -- It was in the hotel _____ he stayed.
Don’t ____ when other people are talking.
After supper she would sit down by the fire , sometimes for _____an hour, thinking of her young and happy days.