Most environmental problems are ______ to lacks of awareness and understanding of humans.

Choose the correct answer in each sentence.

According to the study, the ____________   a marketing campaign is among young people, the better a product is likely to sell.

Don’t take any  ................... of Mike. He’s always rude to everyone.

Choose the correct answer in each sentence.

The train from Piterburgh to Chamberlin travels  _____________  slowly because it has to make a lot of stops.

Choose the best answer:

You don’t like tea, ..............?

 Please stop ..... I can hear you fine! 

He laughed in a very strange way, ................ everyone to turn round and look.

He would have been excused had he chosen to blow his .................. a little, but that is not his  style.

Becoming an astronauts is so demanding that _______ people manage it. 

Choose the best answer:
The computer has dramatically affected ______ photographic lenses are constructed.

Choose the best answer to complete the following sentences.

It is high time we had to ____ some measures to protect endangered animals.

During World War II, the Red Cross organized relief assistance for  ................  and wounded soldiers and administered the exchange of messages regarding prisoners and missing persons.

It can be argued that the future of human life on the planet rests on ____ smooth transition to cities that are more efficient and less wasteful.

Economic reforms began in the Soviet Union in June 1985 by the Soviet leader Mikhail Gorbachev to ......................... the Soviet economy.

Choose the correct answer in each sentence.

The banquet hall was  ______________  decorated for the fund - raising gala on June 11.

Choose the best answer:

Don’t forget ........... the letter for me! – I won’t.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined bold word(s) in each of the following questions: 

Scientists warn about the impending extinction of many species of plants and animals if we don’t take urgent action to save them.

Choose the best answer:

We stayed at home ............. it rained heavily.

Many young people travel all over the world, and do all kinds of jobs before they ______ .

_____ you happen to visit him, give him my best wishes.

He ___ through with his plan although all his friends advised him to abandon it.