The reason _________ the little actress has been such a success is ________ she is both clever and hardworking.

Youmay easily lose your way in Shanghai ______ you don’thave a map or a guide.

He can speak English very _______.

I’m afraid we will have to call the police if you ____ breaking into the car.

After the flooding，people were suffering in that area，________ urgently needed clean water，medicine and shelter to survive.(2012·江苏，22)