18.Speak to him slowly _____ he may understand you better.

18.Speak to him slowly _____ he may understand you better.
A.since B.so that C.for D.because
19.You'll miss the train ______ you hurry up.
A.unless B.as C.if D.until
20.When you read the book,you' d better make a mark _____ you have any questions.
A.at which B.at where C.the place D.where
21.We'd better hurry ______ it is getting dark.
A.and B.but C.as D.unless
22.I didn' t manage to do it _____ you had explained how.
A.until B.unless C.when D.before
23._____ he comes,we won't be able to go.
A.Without B.Unless C.Except D.Even
24.I hurried _____ I wouldn't be late for class.
A.since B.so that C.as if D.unless
25._____ I catch a cold,I have pain in my back.
A.Every time B.Though C.Even D.Where
26.What's the matter _____ they still haven't answered the telegram?
A.when B.that C.though D.however
27.Bring it nearer _____ I may see it better.
A.although B.even though C.so that D.since
28.You may arrive in Beijing early _____ you mind taking the night train.
A.that B.though C.unless D.if
29.Helen listened carefully _____ she might discover exactly what she needed.
A.in that B.in order that C.in case D.even though
30.More people will eat out in restaurants _____ they do today.
A.than B.when C.while D.as
31._____ hard she tries,she can hardly avoid making mistakes in her homework.
A.Much B.However C.As D.Although
32.Poor _____ it may be,there is no place like home,_____ you may go.
A.as; wherever B.though; whenever C.in spite of; when D.that; wherever
33.The child was __ immediately after supper.
A.enough tired to go to bed B.too tired to go to bed
C.so tired that he went to bed D.very tired,he went to bed
34.The history of nursing __ the history of man.
A.as old as B.is old than C.that is as old as D.is as old as
35._____ born in Chicago,the author was famous for his stories about New York.
A.Since B.Once C.When D.Although

18、B so that 以便
19、A unless 除非
20、D where 在...的地方
21、C as 由于
22、A until 直到
23、B unless 除非
24、A since 由于
25、A Every time 每一次
26、B that 引导从句
27、C so that 以便
28、C unless 除非
29、B in order that 为了
30、A than 与...相比
31、B however 无论多么
32、A
33、C so...that 如此...以致...
34、D as...as 和...一样
35、D Although 尽管