13.A.general B.similar C.common D.sharp
12.A.on B.up C.out D.in
11.A.noticed B.looked C.watched D.realized
10.A.smooth B.forget C.correct D.drive
9.A.before B.after C.until D.when
8.A.prettier B.stronger C.smaller D.heavier
7.A.impossible B.possible C.unable D.unsuitable
6.A.fetch B.hold C.keep D.get
5.A.out B.inside C.in D.by
4.A.asked B.noticed C.announced D.told