填空题

Some of my colleagues spent a lot of time in (learn) ______Japanese.

【参考答案】

learning
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填空题
Many species of animals which once lived on the earth are no longer in (exist) ______ .
单项选择题
A. Receptionist and client. B. Teacher and student.C. Employer and employee. D. Doctor and patient.
A. Receptionist and client.
B. Teacher and student.
C. Employer and employee.
D. Doctor and patient.
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