46. As students, we must _____ on our studies and work hard instead of fooling around.
A. investigate B. memories C. approach D. concentrate
【答案】D。
【解析】考查动词词义辨析。句意:作为学生,我们必须集中精力,努力学习,而不是游手好闲。investigate调查;memories记忆;approach接近;concentrate“集中(注意力、精力)”。故选D。
47.Beijing is ________ capital of China.
A. a B.an C. the D./
【答案】C
【解析】北京是中国的首都。a 和 an 泛指一类,且有一的意思,不符合句意,所以排除,capital意思是首都,是唯一的,表特指,所以其前用the,故选C
48.Jack often plays ________ piano and he wants to be a pianist when he grows up.
A. a B.an C./ D. the
【答案】D
【解析】杰克经常弹钢琴,他长大后想成为一个钢琴家。根据语境piano(钢琴)是乐器,play和表示乐器的名词搭配其前必须用冠词the修饰,故答案为D。
49. Only after talking to two students ________ that having strong motivation is one of the biggest factors
in reaching goals.
A. I did discover B. did I discover C. I discovered D. discovered
【答案】B
【解析】考查倒装。句意:只有与这两个学生谈话之后我才意识到有着强大的动力是达到目标的关键因素之一。分析句子结构得知only引导的状语位于句首时要用部分倒装形式。
50. He gave himself a new name to hide his ________ when he went to carry out the secret task.
A. emotion B. talent C. identity D. treasure
【答案】C
【解析】identity 身份; emotion情绪;talent天赋;treasure 珍宝。联系前后语境,并根据“to carry out the secret task”判断要隐瞒“身份”,故选C。
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