It' s only ____（late）that she's been well enough to go out.答案填lately,为啥

It' s only ____（late）that she's been well enough to go out.答案填lately,为啥 It' s only ____（late）that she's been well enough to go out.答案填lately,为啥子呢? It's late.Let him ____(go)home now. It's a small animal.It eats only ____ food it's so late. It’s late .I have to leave 合并为一句 It is late,so I have to____ ____ it's getting late and i ____ go home A.must B.have to It's too late to go to the football match now ,____(何况),it's beginning to snow it's the only It's only a it's only you it's only you It's only spitting. it`s never too late 哪首歌里有：it's too late When it's late at sorry it's too late 选择it is getting late,it's time we ____.it is getting late,it's time we ____ A.go B.went C.are going D.must go 答案是B怎么理解时态?选D不行吗?