主讲教师：张志强 北京市特级英语教师
题一：If _________ from the mountain, the city looks more beautiful.
A. is seen B. seen C. it seen D. saw
题二：The trouble will affect our task a lot unless ________ immediately.
A. solved B. solve C. solving D. is solved
题三：My parents live in a small village. They always keep candles in the house ______ there is a powercut.
A. if B. unless C. in case D. so that
题四：Leave your key with your neighbor ____ you lock yourself out one day.
A. ever since B. even if C. soon after D. in case
题五：Most birds find it safe to sleep in the trees, but ____ they have eggs or young children, they don't use a nest.
A. why B. how C. unless D. where
