13.__________one can succeed depends on__________hard he works.
14.__________manners are very important in every country is known to all but the trouble is__________different countries have different ideas about__________good manners are.
15.All I ask is__________you should tell the truth.
16.It is not clear__________and__________this story took place.
17.__________he will come or not is not easy to say.
18.The twins are so much alike that I never know__________is__________.
19.Good students always pay close attention to__________the teacher says in class.
20.I wonder__________the sound came from.
21.No one can deny the fact__________he has made much proGREss.
22.He asked me__________I wanted.
23.It is quite obvious__________he doesn't want to see you.
24.That is__________we aGREed on at the meeting.
25.His excuse for not being able to come here on time is__________the train was late.
参考答案
13.Whether;how 14.That;that;what 15.that 16.when;where 17.Whether 18.which;which 19.what 20.where 21.that 22.what 23.that 24.what 25.that
