John had to start work at an early age, ____ his family was very poor.

I like monkeys,       they are smart.

—Would you like to play tennis with me _________ it doesn’t rain tomorrow? —Sure, _________ I am busy.

 I always sleep with windows open _______ it is too cold outside.

–Do you offer any discount on the notebooks? –Sorry, sir. There isn’t a discount        you pay more than 100 yuan.