题干
Excuse me, would you please tell me _________ buy a digital camera?
A：what to
B：where to
C：what I can
D：where can I
答案(点此获取答案解析）
B
Excuse me, would you please tell me _________ buy a digital camera?
A：what to
B：where to
C：what I can
D：where can I
元，若使用这台仪器的日平均费用最少，则一共使用了