洞穴博物館

The bad weather is responsible for the small attendance.
出席率低是由於天氣不佳。

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be responsible for...：為...負責，是...的原因

同理，照樣造句：
1.This disgusting man should be responsible for my poor appetite.
2.The traffic jam is responsible for my being late.
3.Sugar and sweets are responsible for diabetes.
4.Eating too much is responsible for being fat.

Single words:
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a.disgusting：a.噁心叭啦的
b.appetite：n.胃口 (apatite：n.磷灰石XD)
c.diabetes:n.糖尿病