Correct the sentences by adding a, an, or the.
a I need /new mouse for my computer,
b Why are you always in good
mood?
Red, yellow and blue are three primary colours.
d Photoshop is program for editing digital images.
e Acid rain is big problem in parts of Europe.
We went out for meal last night at Indian restaurant in South Street,
9 My brother became engineer because he liked playing with motors.
h I lost all my work when computer crashed.
This is book she gave me.
j It takes one hour to finish unit of this book.
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Both Ukraine and Great Britain lie in Europe, but Ukraine is situated on the European continent, and Great Britain is separated from the continent by the English channel. In fact Britain is a sea country. It lies on the crossways of the sea routes to the different parts of the world. Great Britain is bordered by the Atlantic Ocean in the north-west, by the North Sea in the east, and by the Irish Sea in the west.Ukraine is a landlocked country. The major water bodies bordering it are the Black Sea and the Azov Sea in the south. It lies on the crossways of the land routes from the east to the west and from the north to the south, though.Ukraine is larger than Great Britain. The area of Great Britain is 24,500 sq km, and the area of Ukraine is about 604,000 sq km. In both countries there are a lot of mountains. In Great Britain there are the Pennines and the Cambrian mountains. In Ukraine we have the Carpathians and the Crimean mountains.There are a lot of rivers in both countries. In Great Britain they are not very long or deep. The largest rivers in Ukraine are the Dniper, the Dnister, and the Southern Bugh. The Dniper is navigated by large ships. In Great Britain the Thames is wide and deep enough for large ships. The climate in Ukraine is continental. We have frosty winters and sometimes rainy summers. The climate of Great Britain is mild and damp. The winters are not too cold and seldom frosty, and summers are not too hot. The climate is moderated by ocean hreezes.

Dear Charles,
Many thanks for your letter and the formal invitation you enclose. It is very nice of you to offer to meet our expenses while we are in Britain. I gratefully accept it on the assumption that we shall have the pleasure of receiving you here as the return part of the exchange visit.
We can discuss all the points with you personally or by letter should you wish to come over before we go. I suppose this would be a very good idea as the dates of our visits are still vague. Anyhow, I want you to understand that we shall be delighted to have you here with us any time you choose to come.
Once again many thanks and best wishes from my wife and myself.
Yours sincerely,
Nikolay