求大神帮忙做下状语从句1.I’ll let you know ____ he comesback.A.before B.

求大神帮忙做下状语从句
1.I’ll let you know ____ he comesback.
A.before B.because C.as soon as D.although
2.She will sing a song ____ she is asked.
A.if B.unless C.for D.since
3.We will work ____ we areneeded.
A.whenever B.because C.since D.wherever
4.Read it aloud _____ the class can hear you.
A.so that B.if C.when D.although
5._____you go,don't forget your people.
A.Whenever B.However C.Wherever D.Whichever
6.It is about ten years _____ I met you last.
A.since B.for C.when D.as
7.They will never succeed,_____ hard they try.
A.because B.however C.when D.since
8._____ still half drunk,he made his way home.
A.When B.Because C.Though D.As
9._____ she was very tired,she went on working.
A.As B.Although C.Even D.In spite of
10.Busy _____ he was,he tried his best to help you.
A.as B.when C.since D.for