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A. remind
B. has reminded
C. was reminding
D. has been reminding

A. study; for
B. studying; since
C. studying; for
D. to study; since

1. They have been talking for the whole three hours.  (一般疑問句)
    _______ they _______  _______ for the whole three hours?
2. We have been living here for 12 years.  (改為同義句)
    We have been living here               12 years             . 
3. To spit in public places is not polite.  ( 同義句) 
                  isn't polite                            in public places.
4. We have been playing football for two hours.  (對劃線部分提問)
    _______  _______ have you been playing football?
5. "Don't stand in the way," the policeman said to the boy. (根據(jù)句意進行改寫) 
    The police told the boy                                         in the way.
6. He started to practice the guitar three hours ago.  (改成含介詞for的同義句)
    He                            practicing the guitar for three hours.

A. wait
B. waited
C. am waiting
D. have been waiting

[     ]

A. joined
B. have joined
C. have been in

A. gone to
B. been to
C. come to
D. been in

1. Lucy came to Beijing in 2001. (同義句轉換)
    Lucy _____ _____ in Beijing for about six years.
2. "What are you doing, Tom?" Kate asked. (改為間接引語)
    Kate asked Tom _____ he _____ doing.
3. You'll fail in the exam if you don't work hard. (同義句轉換)
  Work hard, _____ you won't _____ the exam.
4. I'm going to Shanghai by plane next month. (同義句轉換)
    I'm _____ _____ Shanghai next month.
5.The government should do something to control the pollution. (同義句轉換)
  The government should _____ _____ _____ to control the pollution.