How about the sanitation of the room？
The room was not ______.
Whom should a student go to if he or she has any questions？
The student should contact ______.
The top of this has a surface which prevents things sliding.
The young journalist _________ (对黛安娜的死做了详细调查).
The AIDS rate in some African countries is_________(是……是十倍之多) that in America.
A break in an English friendship usually comes when ______.