12.Hearing the news,his brother beat him in ___ face.

12.Hearing the news,his brother beat him in ___ face.
A.a B.his C.one D.the
13.My boss gave me his ____ that he would double my pay if I did my job well.
A.warrant B.certainly C.obligation D.assurance
14.The manufacturers ____ that all the TV sets they supply are properly tested.
A.testify B.convince C.warrant D.manifest
15.We must ____ that the telegram arrives in time.
A.warrant B.assure C.ensure D.insure
16.In Britain,the best season of the year is probably ____ spring.
A late B last C latter D later
17.If only the committee ___ the regulations and put them into effect as soon as possible
A approve B will approve C can approve D would approve
18.Our reporter has just called to say that rescue teams will ______to bring out the trapped miners.
A effect B affect C conceive D try
19.I’m ________ enough to know it is going to be a very difficult situation to compete against three strong teams.
A realistic B conscious C aware D practical
20.You can use the Course Calendar to help ____ your students of important dates in the course,such as test dates.
A.warn B.remind C.convince D.deprive