用所给词的适当形式填空
（1）Mother is very busy. She has lots of housework____(do)every day.
（2）____(be)there many trees here last year?
（3）Mum, may I play computer games? I'm____(bore).
（4）It's great____(visit)the Great Wall in China.
（5）Who was your____(one)friend, Li Lei, Jim or Jack?
