We cant play tennis because it rains

Если перевод, то вот: 
Мы не можем играть в теннис потому, что дождливо.

Ничего, если проект будет про российский рубль?

Russian Ruble is the official currency of Russian Federation. It is also used as a medium of exchange in many former soviet republics. Russian ruble is one of the world's oldest currencies. It appeared in 15th century during the so-called Silver Bum. At the time, Russian coins were made of silver. Soaring demand for silver across continental Europe resulted in growth of value of Russian silver coin to a point when they were no longer useful for purchases. People started splitting coins in halves. Russian word for "split" or "cut" is rubit'' and the half coins were called rubles. Even though Russian coins no longer come in halves, the name stuck on.

During the czar rule Russian rubles were one of the worlds highly valued currencies as they were backed by serious stockpiles of gold. During the Bolshevik revolution, most of that gold was shipped out of Russia, so the Soviet ruble's did not have much value. It did not matter anyway as the Soviet rules kept fixed rate of ruble. In 1993 Russian government has removed price fixing, but it continues to intervene into currency markets to keep the value of ruble at a lower rate than it actually is to stimulate Russian export producers.

Democratic revolution of 1991 led to abandonment of price fixing. "The shock therapy" resulted in immediate plunge of national currency as former soviet republics continued to print Russian rubles and exchange them for Russian goods creating inflation in Russia and devaluing its currency. Inflation was as high as 1000% per year! By mid 90s Russian authorities announced that they would no longer allow now formally independent countries to print Russian national currency. Russian ruble grew steadily until 1998 when the Asian financial crisis moved on to Russia. Value of ruble dropped four times overnight and has not changed ever since. 

See current exchange rate of Russian currency now. If you need help arranging currency exchange for your trip to Russia we will be glad to assist you. Our representative will come to you hotel in Russia and exchange dollars for rubles at a current market rate.

a) What is your national dish? My national dish is borsch.

b) When do people eat your national dish? People usually eat borsch for dinner because it is a soup.

c) Is it cheap or expensive to make? Borsch is quite cheap to make.

d) What are the ingredients of your national dish? The main ingredients of borsch are meat, potatoes, Cabbage,beets,carrots, some sour cream (when the dish is ready).

e) Is it healthy or unhealthy? Borsch is healthy food.

f) Is your national dish easy to make? Borsch is easy to make.

g) What do people drink with your national dish? Some adults drink vodka when eating borsch at the restaurants. Normally people don’t drink anything with soup.

h) Is your national dish popular in other countries?​ borsch is very popular worldwide.