The man didn’t know ________ the thief broke into the house and stole all his valuable things. [ ]

I’m not going swimming tomorrow afternoon.— ________. I have to clean up my bedroom.

I would appreciate_____ if you could give me a ride home.[ ]

Jay Chou is popular among young people in Hong Kong _____ his nice voice.

We’ve got to be_________ and buy only what we can afford.