（2017年四川成都）Many people still try to climb Qomolangma every year _______ it is very dangerous.
A. when B. if C. though
（2017年山东泰安）I didn’t believe I could do it ____ I got to the top of Mount Tai.
A. unless B. until C. after D. as
（2017年山东青岛）Jack’s mother was so tired. She fell asleep she lay down on the bed.
A. until B. as soon as C. unless
（2017年安徽）Hold your dream, _____ you might regret some day.
A. and B. or C. but D. so
（2017年四川南充）-Mike, let’s prepare for our baseball game.
-OK. We’ll lose the game ______ we try our best.
A. unless B. once C. after D. since
（2017年山东泰安） –What do you think of Wilson’s speaking?
--No one does _______ in our school.
A. good B. well C. better D. best
