11.I learned a littleRussian _____ I was at middle school.

11.I learned a littleRussian _____ I was at middle school.
A.though B.although C.as if D.when
12._____ we got to thestation,the train had left already.
A.If B.Unless C.Since D.When
13._____ the rainstops,we' 11 set off for the station.
A.Before B.Unless C.As soon as D.Though
14.She was _____ tired_____ she could not move an inch.
A.so,that B.such,that C.very,that D.so,as
15.We didn’t go home_____ we finished the work.
A.since B.until C.because D.though
16.I'll stay here _____everyone else comes back.
A.even if B.as though C.because D.until
17.Although it'sraining,_____ are still working in the field.
A.they B.but they C.and they D.so they
18.Speak to him slowly_____ he may understand you better.
A.since B.so that C.for D.because
19.You'll miss thetrain ______ 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