Living with technology

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二: 完形填空（共20小題；每小題1分,滿分20分）��
it is always interesting to visit another country, especially for those who have never traveled a great deal.   16   travel can be very educational for anyone,  17  he is interested enough to make preparations beforehand.   18   the language of the new country would be    19   for the traveler to attempt,   20   the benefits of such an effort would become    21   immediately after his arrival. it   22   not seem important to him when he is comfortably situated at home,   23   knowing how to   24   a meal or rent a room is essential for the newcomer in a   25   country.    26   knowing the language, it is very difficult for the stranger to   27   the people of the new country and   28   customs.
of course, in our small world, it is   29   possible to find someone who understands 30   own language, but this is only second-best for the traveler. to be   31   , he can see places and things without the use of a language,   32   places and things are   33   the heart of any country. to get the greatest benefit from a trip to another country, it is indeed   34   for the visitor to have an understanding of the   35   .
16.a. national b. international  c. domestic      d. abroad
17.a. if b. unless       c. since   d. so
18.a. knowing       b. saying      c. learning    d. studying
19.a. easy b. simple       c. difficult  d. impossible
20.a. and b. therefore   c. although      d. but
21.a. obvious b. invisible   c. useful   d. useless
22.a. did21世紀教育網        b. must       c. may       d. can
23.a. although b. but    c. where   d. when
24.a. order b. book       c. cook       d. eat