—Jeff, your bike looks beautiful __________it is a little old.—Thank you. I got it on my tenth birthday.

She didn’t know__________she could express her ideas clearly when she was invited to speak at the meeting.

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

___________ the young girl ___________ her parents take regular exercise in order to keep fit. 

—When did your daughter go to sleep last night?—She didn’t go to bed ______ she finished her homework.