问题

I think the biggest problem in banning smoking is ______ people can buy cigarettes easily.

A:that
B:whether
C:where
D:how

正确答案是：

同类题型

What did you say to Julia? I saw her crying in the dormitory alone.— It _____ my fault. We talked happily when I was with her in the classroom. [ ]

You mean we will have the mid-term exam in early November—Yes. ________

downloading of large numbers of apps is one of the most risky behaviors someone with a smartphone can engage in.

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I was worried about my math，but MrBrown gave me an A —______________