第16题: [单项选择]American researchers found that the language clock could help ______. A. count the exact time by years B. decide when the language came into being C. make sure when the Aleuts left the mainland D. determine how the time changed 参考答案:C 答案解析:由文章最后一句知,the investigators可以根据the language clock来calculate the date of the event,故选项C正确。
第18题: [单项选择]The police must waste no time in ______ the escaped murderer in the forest. A. searching B. chasing C. investigating D. looking 参考答案:B 答案解析:[解析] 本题考查动词词义辨析。本题四个选项中chasing(追赶)和the escaped murderer搭配最为恰当,因此选项B为正确答案。
[避错指南] 选项A(search)作及物动