168.(10-11，河南省焦作市修武一中高二上期中)My grandparents live in a small village. They always keep candles in the house _____ there is a power failure.

A. in case　　 B. so that　　 C. as if　　 D. even though

167.(10-11，广东省汕头金山中学高二上期中)The flight will be announced soon. _____ , please remain seated.　

A. However　　 B. Yet　　　　　　 C. Therefore　　　　　 D. Meanwhile

166.(10-11，广东省汕头金山中学高二上期中)No matter how frequently ________ , the works of Beethoven always attract large audiences.

A. being performed　 B. to be performed　　 C. performed　 D. performing

165.(10-11，甘肃省兰州市兰炼一中高二上期中)You’ d better take something to read when you go to see the doctor___you have to wait.

A. even if　　　　 B. as if　　　　 C. in case　　　 .D in order that

164.(10-11，甘肃省兰州市兰炼一中高二上期中)You will be successful in the interview ___ you have confidence.

A. before　　　　 　 B. once　 　　　　 　C. until　 　　　　　 D. though

163.(10-11，甘肃省兰州市兰炼一中高二上期中)He tried his best to solve the problem, ____ difficult it was.

A. however 　 　B. no matter 　　　　　　　 　C. whatever　 　　　 D. although

162.(10-11，福建省厦门市同安一中高二上期中)Peter was so excited _______he received an invitation from his friend to visit Chongqing.

A. where　　　 B. that　 C. why　 　　　　D. when

161.(10-11，福建省厦门市同安一中高二上期中)The flowers his friend gave him will die unless ______ every day.

　A. watered　　 　 B. watering　　　 　　 C. water　　　 　　　　 D. to water

160.(10-11，福建省三明一中高二上期中)He decided not to say anything at the meeting unless _________.

A. asking to　 B. to ask to　 C. asked to　　 D. ask to

159.(10-11，福建省三明一中高二上期中)I was reading a novel ________ the light suddenly went out.

A. while　 B. when 　　C. as　　　　　　　　　　　　　　　 D. so