What does this below rebus puzzle mean?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

If six children and two dogs were under an umbrella, how come none of them got wet?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If a wheel has 54 spokes, how many spaces are there between the spokes?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

What is the word or phrase?

Before Mount Everest was discovered, what was the highest mountain in the world?