1. Paper ____________ first ____________ about two thousand years ago in China by Cai Lun.
A. is; inventing B. is; invented
C. has; invented D. was; invented
2. — The passenger refused to move after taking another one’s seat!
—What a shame! He ____________ according to the new credit system(誠信體系).
A. punish B. punished
C. will punish D. will be punished
3. — I enjoy walking on the clean streets in the morning.
— You know they ____________ by the hard-working cleaners every day.
A. clean B. are cleaned
C. are cleaning D. will clean
1. D【解析】句意：在中國大約兩千年前，紙最開始被蔡倫發(fā)明。本題考查時(shí)態(tài)語態(tài)。A.現(xiàn)在進(jìn)行時(shí)；B.一般現(xiàn)在時(shí)的被動(dòng)語態(tài)；C.現(xiàn)在完成時(shí)；D.一般過去時(shí)的被動(dòng)語態(tài)。主語paper與謂語invent之間為被動(dòng)be done，排除A和C；且根據(jù)two thousand years ago可知，用一般過去時(shí)的被動(dòng)語態(tài)，故選D。
2. D【解析】句意：——乘客坐了另一個(gè)乘客的座位后拒絕調(diào)動(dòng)！ ——他的行為太羞恥了！根據(jù)新的信用規(guī)則，他將受到懲罰。A為動(dòng)詞原形；B為過去式；C為一般將來時(shí)；D. 為一般將來時(shí)的被動(dòng)語態(tài)。結(jié)合語境可知，主語He和punish之間存在著被動(dòng)關(guān)系，因此應(yīng)該用被動(dòng)語態(tài)；再者，乘客坐了另一個(gè)乘客的座位后拒絕調(diào)動(dòng)！該乘客是將要接受懲罰的，因此時(shí)態(tài)為一般將來時(shí)，綜合分析可知，本題應(yīng)該用一般將來時(shí)的被動(dòng)語態(tài)。故選D。
3. B【解析】句意：——我喜歡早上在干凈的街道上散步。——你知道它們每天都被勤奮的清潔工打掃。考查一般現(xiàn)在時(shí)的被動(dòng)語態(tài)。A. clean打掃，動(dòng)詞原形；B. are cleaned一般現(xiàn)在時(shí)的被動(dòng)語態(tài)；C. are cleaning現(xiàn)在進(jìn)行時(shí)態(tài)；D. will clean一般將來時(shí)態(tài)。根據(jù)You know they _ by the hard-working cleaners every day.可知本句為主從復(fù)合句，從句的主語they和謂語動(dòng)詞clean之間存在邏輯上的被動(dòng)關(guān)系，所以應(yīng)用被動(dòng)語態(tài)；由every day可知句子時(shí)態(tài)用一般現(xiàn)在時(shí)，一般現(xiàn)在時(shí)的被動(dòng)語態(tài)構(gòu)成為am/is/are+動(dòng)詞的過去分詞，主語是they，be動(dòng)詞用are，clean的過去分詞是cleaned；故答案選B。
