— Who helped Li Lei with his English?   —         , he learnt it by himself. 

The Olympic Games makes _____ possible for people to live side by side in peace.

Science is more than a collection of unrelated facts; to be meaningful and valuable,________ must be arranged to show generalized character.

 --How is_______ going with you?　　　-- So so.

-You have got three dictionaries, don’t you ?- Yes, I bought one.______ two were presents from my parents.