16. The zoo worker told the visitors that in the case of a highly ________ animal, performance training is easy and not so painstaking.

　　A. intelligent B. interactive

　　C. internal D. initial

　　[解析]句意：动物园工作人员告诉游客，在碰到高智商动物的情况时，训练表演很容易，不那么费劲。intelligent 聪明的;interactive 相互作用的，相互影响的;internal 内部的，里面的;initial 开始的，最初的。由句意可知A项正确。

　　[答案]A

　　17.—What do you think of investing in today's stock market?

　　—There are many risks, but also many ________ gains.

　　A. potential B. confidential

　　C. influential D. preferential

　　[解析]句意：—你认为投资现今的股票市场怎么样?—有许多风险之处，但也有潜在的获利机会。potential 潜在的;有潜能的;confidential 机密的;机要的;influential 易受影响的;preferential 优先的，优待的，优惠的。由句意可知A项正确。

　　[答案]A

　　18.________， the boys were shouting and singing.

　　A. Happy and excited B. Happily and excited

　　C. Happily and excitedly D. Happy and excitedly

　　[解析]句意：既高兴又兴奋，男孩子们又喊又唱的。分析结构可知，此处用形容词作状语，表示主语 the boys 的状态，故A项正确。

　　[答案]A

　　19.After climbing up the top of the mountains, the three of them sat there, ________.

　　A. hungry and tiredly B. hungrily and tiredly

　　C. hungry and tired D. hungrily and tired

　　[解析]句意：爬到山顶之后，他们三个坐在那，又累又饿。由语境可知，此处是形容词作状语，表示主语 the three of them 所处的状态，故C项正确。

　　[答案]C

　　20.After the long journey, the Smiths returned home, ________.

　　A. safely but tired B. safe but tired

　　C. safe and tiring D. safely and tiring

　　[解析]句意：长途旅行过后，史密斯一家回来了，安全但很疲惫。由语境可知，此处应用形容词作状语，表示主语 the Smiths 的状态，故选B项。C项 tiring 不能修饰人。

　　[答案]B

　　21.His first book is of great use for our course. But his latest one is ________ worth reading.

　　A. better B. more

　　C. much D. very

　　[解析]句意：他的第一本书对我们很有用。但他最近的这一本更值得一读。be well worth doing 很值得做某事，well 的比较级为 better，故A项正确。

　　[答案]A

　　22.The Chinese women's volleyball team was the champion in the 16th Asian Olympic Games but the Korean women's volleyball team was only ________ beaten.

　　A. nearly B. narrowly

　　C. hardly D. slightly

　　[解析]句意：中国女子排球队是第16届亚运会的冠军，但韩国女子排球队险些胜利。nearly 接近;narrowly 险些，差点儿;hardly 几乎不;slightly 稍微，略微。be narrowly beaten“勉强被打败”，言外之意是“差点赢了”。

　　[答案]B

　　23.—What time do we have to be at the gate of the museum?

　　—________ the visitors begin to check in.

　　A.Immediately B.Quickly

　　C.Hurriedly D.Gradually

　　[解析]immediately 引出时间状语从句，意为一……就……。

　　[答案]A

　　24.It's likely that she will be______ from punishment, as our teacher has been convinced by her excuse.

　　A.absent B.distant

　　C.distinct D.desperate

　　[解析]be absent from 逃脱……。

　　[答案]A

　　25. On snowy days, you have to drive very ________ to avoid traffic accidents.

　　A. cautiously B. neatly

　　C. smoothly D. properly

　　[解析]句意：在下雪天，你得小心翼翼开车以避免交通事故。cautiously 小心谨慎地;neatly 整洁地;smoothly 顺利地，平稳地;properly 合适地，恰当地。由句意可知A项正确。

　　[答案]A

　　26.She not only entered the competition—she ________ won it!

　　A. hopefully B. especially

　　C. actually D. exactly

　　[解析]hopefully 有希望地;especially 特别，尤其;actually 事实上，竟然;exactly 确切地;由句意“她不但进了比赛，还竟然赢了”可知，此处表示意想不到的结果，用 actually表示“竟然”。

　　[答案]C

　　27.When Helen saw her tutor nod ________ to her, she calmed down and went on with her performance.

　　A.encouragingly B.amazingly

　　C.interestingly D.accordingly

　　[解析]encouragingly 鼓励地。句意：当海伦看到导师鼓励地向她点头，她平静下来继续演出。

　　[答案]A

　　28.With everything destroyed in the flood, he felt ________ hopeless and killed himself.

　　A.hardly B.luckily

　　C.sincerely D.totally

　　[解析]totally hopeless 完全绝望了。

　　[答案]D

　　29.—I'm not feeling very well, Barton. To tell you the truth, I'm tired of the present life.

　　—I suggest you do some ________ exercise to keep fit.

　　A.normal B.general

　　C.common D.regular

　　[解析]regular 有规律的，符合句意。general 一般的;common 常见的，共同的;normal 正常的。

　　[答案]D

　　30.Teachers' Day is a festival based more on the ________ aspect than the material level, and the stress on gifts has caused it to lose its original meaning.

　　A.physical B.moral

　　C.cultural D.spiritual

　　[解析]spiritual 精神的。句意：教师节是一个更多以精神而不是以物质为基础的节日，并且礼物的压力已使它丧失了最初的意义。

　　[答案]D