It's so hard for her to lose weight.
体重を落とすのは彼女にはとても難しい
It's so [unbearably, stiflingly] hot in here.
ここはとても［耐えられないほど，むっとして］暑い
It's still a long way from completion.
それはまだ完成には程遠い
It's strange that ....
…なのは不思議だ
It's such a performance cleaning it.
その掃除はとても大変だ
It's surprising.
それは驚いた
It's suspiciously cheap.
妙に安い
It's ten after eleven.
１１時１０分
It's the coffee.
コーヒーのせいだ（◆相手がなかなか寝つけないと言ったときなどに）
It's the done thing to do ....
…するのが決まり［常識］だ
