1.Tough the nurse is very tired ,_____she is still working h

1.Tough the nurse is very tired ,_____she is still working hard.
A.but B.and C.yet.D.if
2.No matter how hard he worked,_____.
A.he could not do any better B.and he could not do any better C.so he couldn't do any better D.but he could not do any better
3._____we ha ve finished the course,we shall start doing more revision.
A.for now B.ever since C.now that D.by now
4.____difficult the work may be ,we must try out best.
A.whatever B.however C.how D.what
5.Mary is in favor of going to the movie ,_______her husband insists on staying at home.
A while B meanwhile C in the meantime Dat the same time
6._____I'm willing to help you,but they are .
A.not only B.no because C.not so D.not for
7.I can't give these orders _____you can change the note.
A.IF B.until C.because D.unless
8.To love ______is the greatest happiness.
A.and be loved B.and being loved C.and to be loved D.and love
9.during the examination we were supposed to stay in our seats ,keep out eyes on our work _____ to anyone.
A.but could not talk B.rather than speak C.instead of speaking D.and not to speak
10.Nancy hasn't begun working on her Ph.D_______working on her master's.
A.still because she is yet B.yet as a result she is still C.because she is still D.still while she is already
11.It is 18 years _____he lived in the small village
A.that B.sinceC.after D.until
12.______it's raining ,we shall stay in the room.
A.as B.after C.when D.if
13.wome people like to play cheese ,______others don't.
A.when B.while C.as D.since
14.it's nearly seven 0'clock .jack ______be here at any moment
A.must B.need C.should D.can
15.tom ought to _____me your secret,but he meant no harm
A.hace told B.tell C.be telling D.having told
16.the word here must be wrong
A.must not be B.needn't be C.can't be D.would not be
17.he ____ to the party tommorw id he has sth important to do .
A.needn't to come B.don't need coming C.needn't come D.don't need come

1.A.有Though就不能再用别的连词.
2.A.No matter how引导从句,后面的应为主句了.
3.C.既然 4.B.无论多么困难.5.B.而,表转折.6.A.不但,而且
7.D.除非.8.A.9.B.10.C.11.B 12.D.13.B.14.C 15.A.16.17.C