A storm in a teacup:
杯子裏(lǐ)有一風(fēng)暴 ×
小題(tí)大做 √
例句：
It’s just a storm in a teacup.
這就是小題大做。
PS:
Do not make a mountain out of a molehill(無(wú)意義(yì)的事).
不要小題大做 。
Head in the clouds:
頭(tóu)在雲裏(lǐ) ×
做白日夢(mèng) 思亂(luàn)想的 √
例句：
Rather than having his head in the clouds, he needs to be brought down to earth.
我們(men)不要在做白日夢，最好現實一點(diǎn)。
