单项选择题

The award-winning beach house is quite strong because ______.

A．it is strengthened by steel rods
B．it is made of redwood
C．it is in the shape of a shell
D．it is built with timber and concrete

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现在“瘦身”很流行。请你谈一谈“瘦身”一词的含义和人们喜欢它的原因以及如何去瘦身。Slimness