While shopping, people sometimes can’t help ____ into buying something they don’t really want.
The Olympic Games are held _____.
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.