It’s time that we _____ to take care of our own house.
A. begin
B. will begin
C. have begun
D. began
A. begin
B. will begin
C. have begun
D. began
【答案】
A. begin
B. will begin
C. have begun
D. began
A. begin
B. will begin
C. have begun
D. began
【答案】
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