题目
The prefixes "con-" and "com-" are used with certain words to add the meaning "with" or "together", like "compound".combinecommercialcomparisoncompoundconcentrateconcernconsistentcontaincontextconvert1) He didn't seem ____ about his son's safety even if the boy hadn't come home.2) What rate will I get if I ____ my euros into US dollars?3) Our ____ effort and contribution will lead to the country's further development.4) The movie was not a ____ success because nearly 90% of the audience like it.
The prefixes "con-" and "com-" are used with certain words to add the meaning "with" or "together", like "compound".combinecommercialcomparisoncompoundconcentrateconcernconsistentcontaincontextconvert1) He didn't seem ____ about his son's safety even if the boy hadn't come home.2) What rate will I get if I ____ my euros into US dollars?3) Our ____ effort and contribution will lead to the country's further development.4) The movie was not a ____ success because nearly 90% of the audience like it.
题目解答
答案
1. concerned 2. convert 3. combined 4. commercial
解析
本题考查前缀"con-"和"com-"的用法，需根据语境选择正确单词。解题关键在于：
- 掌握前缀含义："con-"和"com-"常表示"with"或"together"，但需结合具体单词理解细微差别；
- 辨析同根词的词性与含义：如"concern"（动词/名词，关心）与"concerned"（形容词，担心的）；
- 语境匹配：根据句子逻辑关系（如否定、结果等）选择最贴切的形容词或动词。
1) He didn't seem ____ about his son's safety...
- 关键点：
seem后需接形容词；表示"对...感到担心"。 - 选项分析：
concern是动词，其形容词形式concerned表示"担忧的"，符合语境。
2) What rate will I get if I ____ my euros into US dollars?
- 关键点：表示"将欧元兑换成美元"的动作。
- 选项分析：
convert意为"转换、兑换"，是唯一符合此动作的动词。
3) Our ____ effort and contribution will lead to...
- 关键点：修饰名词
effort，表示"合作的"。 - 选项分析：
combine的形容词形式combined表示"联合的、结合的"，强调共同作用。
4) The movie was not a ____ success because...
- 关键点：表示"并非商业上的成功"。
- 选项分析：
commercial意为"商业的"，与后文"90%观众喜欢"形成对比，暗示票房或收益未达预期。