问题
选择题
The policeman told the injured bicycle rider that he would have to lie _____ he had fallen until the arrival of an ambulance.
a. because b. where c. after d. when
答案
答案：B
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The policeman told the injured bicycle rider that he would have to lie _____ he had fallen until the arrival of an ambulance.
a. because b. where c. after d. when
答案：B