英语脑筋急转弯

What demands an answer, but asks no question?

My voice is tender, my waist is slender and I'm often invited to play.

A husband was called by the police telling him that his wife was killed and that he should get to the crime scene as soon as possible.

I am two-faced but bare only one, I have no legs but travel widely.

There is a bus full of people travelling over San Francisco and no one gets off the bus throughout the journey.

I look flat, but I am deep, Hidden realms I shelter. Lives I take, but food I offer. At times I am beautiful.

The leaves are on the fruit, The fruits is on the leaves.

Pronounced as one letter, And written with three, Two letters there are, And two only in me.

I run through hills; I veer around mountains. I leap over rivers and crawl through the forests.

I work outside both day and night in sunshine or in rain.