(2013北京)26. I have an appointment _________ Dr. Smith, but I need to change it.
A. to B. off C. with D. from
(2013福建)29.Mrs. Smith finds it hard to clear up the mess, as her children are always ____ whenever s he tries t o.
A. in the way B. on watch C. in sight D. on the line
(2 013安徽)22 Before you pay a visit to a place of interest, look in your local library_________ a book about it.
A. on B. at C. for D. to
