781.I called the airline to _____ my flight reservation a week before I left for Canada.
A.obtain
B.admit
C.confirm
D.appoint
782.If your race car isn't insured, you may _____ losing everything when it hits something solid.
A.delay
B.deny
C.avoid
D.risk
781.答案是C;
obtain获得，得到；admit承认，公认;confirm证实，巩固，确认;appoint委派，任命。
782.答案是D;
delay耽搁，延误;deny否认;avoid避免:冒险。此处risk doing sth.冒险干某事。
783.I wonder why he has been acting so strange these days.
Recent pressure at work may ____ his behavior.
A.account for
B.make for
C.change for
D.stand for
784.Their play ____ a great success and brought in a large profit to the theatre.
A.appreciated
B.enjoyed
C.expected
D.seized
783.答案是A；
account for解释...的原因;make for有助于，向…前进；change.. for 更换，交换;stand for 代表，象征。
784.答案是B;
appreciate 欣赏，感激;enjoy 享受，享有(利益，权益,声誉)。enjoy a great success享有巨大成功。
785.All the rooms are _____ with electric lights, but electricity _____ will be cut off if money is not handed in in time.
A.supplied;supply
B.given;supply
C.offered;supplied
D.burnt;supplied
786.In my opinion, the girl ____ to be a good dancer if she is well trained in an art school.
A.expects
B.hopes
C.wishes
D.promises
785.答案是A;
表示“供给”supply…with;第二空为名词供应故选A。
786.答案是D;
promise有...的希望;expect 期待，预料。
787.Leaving your car unlocked outside is just ______ trouble.
A.attracting
B.drawing
C.resulting
D.inviting
788.She usually ______ creative imagination with intelligence to create some wonders.
A.connects
B.joins
C.combines
D.associates
787.答案是D；
invite 引起，招致；attract 吸引。
788.答案是C；
connect…with 连接，联系;join…to 连接;combine…with 把…与…结合;assoociate…with联合，联系，结交。