Which one?
La la la
Time
London
The White House
100

the first day of the week

Monday

100

a musical instrument that you play by blowing into a hole at the top while putting your fingers over other holes

recorder

100

...June

in


100

This is where the king or queen lives.

Buckingham Palace

100

Whose home is it? 

The US President's.

200

the last weekday

Friday

200

a musical instrument that you hold under your chin and play by pulling a long object called a bow across its strings

violin

200

...summer

in

200

This museum is next to Tower Bridge. 

The Tower of London

200

How many floors are there? 

6

300

the first day at the weekend

Saturday
300

a large musical instrument with a row of black and white keys that produce notes when you press them

piano

300

...morning

in the

300

It's a very big ferris wheel. You get an amazing view from it. 

London Eye

300

What's the President's office called? 

The Oval Office

400

two days after the second weekday

Thursday

400

a musical instrument consisting of a tight skin stretched over a round frame that you hit with your hands or a stick

drums

400

...Friday morning

on
400

It's a huge square. You can feed pigeons there, and you can find a lot of museums (e.g. the National Gallery) and Nelson's Column there. 

Trafalgar Square

400

How many people visit it every year? 

2 million

500

two days after the day before yesterday

Wednesday

500

a musical instrument consisting of a long curved metal tube that you play by blowing into it as you press its keys with your fingers

saxophone

500

... Christmas

at

500

You can find many theatres and cinemas there. 

West End

500

Where is it? 

In Washington DC