109.（单选题）The committee ______ 12 members.

19.（填空题）The new technique will ______ （able）them to doubletheir production.

18.（填空题）Remember that smoking is ______ （harm）to you.

17.（填空题）A ______ （chemistry）element of water is oxygen.

16.（填空题）It is a seriously ______ （contamination）river.

15.（填空题）They sell this shirt in _____ （variety）colors and sizes.

14.（填空题）There was no _________ （feedback）about the map of Newark International Airport.

13.（填空题）A hearing （听证会）was held for building the new __________ （platform）at Tokyo Railway Station.

12.（填空题）It’s important to remain mentally ______ （act）after retirement.

11.（填空题）I’m hoping for a good return on my______ （invest）.

10.（填空题）If you ignore your diet, trouble will __________.（follow）