21．This book is said to be a special one, which____many events not found on other history books.

It’s said that an American teacher will teach us English this year. —-Wow !________!We can practice our spoken English better.

I hate people ________ talk much but do little.

What a mess！Tom，I have told you over and over again not to leave everything

I don’t have a partner to play table tennis with.— Why _____ a sports club There you can find some good partners.