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which one do you prefer, the red or the blue shirt?

i'm not sure which way to go at the intersection.

the restaurant, which is located downtown, is very popular.

she has two brothers, which makes her the middle child.

the results show which factors influence student performance.

you can call me at any time, which is convenient for you.

the books, which were published last year, are already bestsellers.

i'm confused about which seat is mine on the train.

this explains which strategy would work best for the project.

she couldn't decide which dress to wear to the party.

the study reveals which habits contribute to better health.