问题
选择题
After ________ half a kilometer, I ________ feel tired. [ ]
A. run, begin to
B. running, began to
C. to run, began to
D. running, begin with
答案
答案：B
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After ________ half a kilometer, I ________ feel tired. [ ]
A. run, begin to
B. running, began to
C. to run, began to
D. running, begin with
答案：B