My father didn’t go to bed ______ he washed his car last night.

—Susan, what are the advantages of MP5 players?—Mom, they are smaller and lighter ______ they can be carried very easily.

---_____ have you lived in England?    --- For 3 years.

–What was your brother doing at this time yesterday?–He was reading a magazine ________ I was writing an e-mail at home.

Nobody here can tell    our teacher will criticize（批评） us or not.