ひこうきと しんかんせんでは どっちのほう（ ）べんりですか。
a. が b. の c. は d. を
The intended meaning is between aeroplanes and shinkansen trains, which is more convenient?
The answer is a. が.
For detailed explanation of the comparison sentence pattern, please watch this video. (If the video is not showing below, please kindly click the video.)
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