---David, the weekend is coming. What shall we do?---_______ go hiking in the countryside?
It took me two weeks________reading the novels written by Guo Jingming.
---Tim played the guiter very well in the school talent show. ---I think so.He practices________it every day.
---What about _______ a rest? ---OK!Let’s go for a walk.
You should _______ in the dictionary when you meet a new word.
It’s a good idea _____ a pen friend to practise English.