The room was dark, _______ I turned on the lights.

--Lucy is doing her homework. ---Let’s ask Lily _______.

He wants to be an actor ________ it’s an exciting job.

I am sure I will do it well __________you give me this chance.

Tom didn’t understand the text ________ the teacher explained it to him.

My parents are ______ famous writers.

After school he didn’t go home . _______ he went to the Internet café (网吧)..

I usually sleep with the window open _____ it’s very cold.

I often watch TV,           this evening I’m doing my homework .

Keep off the drugs（毒品）,         you and your family will be in great danger?