求英语高人解答以下10道选择题，万分感谢！

求英语高人解答以下10道选择题，万分感谢！
1.more recently,_researchers have turned their attention to the study of variation patterns in american english and to the social and historical sources of these patterns.
a. linguist b. linguistic c. lingual d. lexical
2.arns race is an intense competition between nations to_technologically advanced and militarily strategic weapon systems.
a.strengthen b.collect c. heap d.accumulate
3.in his speech,there is no information_to the recent development in cancer research.
a. belonging b.bringing c.leading d.pertaining
4. for some serious coin collectors,a coin with a different date,mint mark,and even a little_in design is counted as a different coin.
a. contrast b.diversity c.variety d.variation
5. the total land area of hong kong,sar(special administrative region),is small,_only 1076 square kilometers(415 square miles).
a. comprising b.including c. making d.occupying
6.in different historical times,***s have_by various means to promote the common welfare of the members of the society over which it exercises control.
a. decided b.endeavoured c.manoeuvred d.struggled
7. industrialization without proper planning may bring about_effects to natural environment.
a. drastic b.enormous c.uncontrollable d.undesirable
8. children under the age of ten may be harmed by the_physical requirements of a ballet class.
a.active b.hard c.strenuous d.vigorous
9. quite a large number of old people enjoy_in gardens on sunny afternoons in winter.
a. sauntering b.tramping c.trotting d.wandering
10.with the growth of air travel,airports became symbols of international prestige, often designed by internationally_architects.
a. capable b.infamous c.notorious d.renowned
1楼的，你在干吗？ canlover 1年前他留下的回答 已收到1个回答

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1.More recently,_researchers have turned their attention to the study of variation patterns in American English and to the social and historical sources of these patterns.
A. linguist B. linguist...

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