EXERCISE 27
  　Travelling can be fun and easy.A vacation trip to another country is especially __1_ when the travelling conditions¹ are good.Good travelling conditions __2_ a comfortable mode² of transportation,knowledge of the __3_ language,familiarity __4_ the custom³ and habits of the people in the country,and pleasant travelling __5_.All of us have had nice trips __6_ this.
  　Most of us have aslo had trips that we would __7_ to forget.Many conditions can produce a bad __8_ experience.For example,if the four conditions __9_ above do not exist,we will probably have a bad experience,__10_ at best a difficult __11_.Students who travel to a __12_ country to study often have a difficult trip.They usually travel __13_.They don't know the language of the new country __14_.They often arrive in the new country __15_ a judge⁴ international airport.From the airport,they need to __16_ their way to their school.Maybe they need to __17_ airplanes,to take a bus,a train,or a taxi.They need to do all this in a country__18_ everything is unfamiliar⁵.Later,after the experience are __19_,they can laugh.But at the __20_,they feel terrible.     
 
1)   A  happy           B enjoyable         C amusing    D favorable

2)   A  include          B conclude         C hold        D contain

3)   A  place's           B area's           C country's     D city's
 
4)   A  to               B for             C of           D with
 
5)   A  companions       B friends         C comrades     D fellows
 
6)   A  with             B as             C like          D of
 
7)   A  have             B think          C wish         D need
 
8)   A  tripping          B travelling       C passing      D visiting
 
9)   A  told             B numbered       C talked       D listed
 
10)  A  or               B and           C but          D so
 
11)  A  case             B one           C thing        D practice
 
12)  A  different          B another       C foreign       D other
 
13)  A  separate          B lonely        C alone         D single
 
14)  A  yet              B either         C too          D already
 
15)  A  at               B to            C on           D from
 
16)  A  watch            B see          C notice        D find
 
17)  A  thift             B exchange     C board         D change
 
18)  A  where           B that          C when         D which
 
19)  A  ended           B over          C completed     D finished
 
20)  A  date            B time           C while         D day
 
 
参考答案：
1--5  BACDA     6--10  CCBDA     11--15  BCCAA     16--20  DDABB