The composer Verdi has written the opera Aida to celebrate the opening of the Suez Canal, but the opera was not performed until 1871 

Do you think what people have smoked less and less?

Do you think that the humans will ever be able to live in other planets?

The society was set up to ...... endangered species from extinction.

The more important theorem of all in plane geometry is the Pythagorean Theorem

Bats use echoes of their own high – frequency sounds to detect food and avoiding obstacles.

Choose the correct answer to complete the sentence. "Such unhygienic conditions encourage the spread _____ diseases."

There are some wild roses whose flowers smell sweetly.

Water , ice, and snow play a role in affecting an Earth’s rotation

Each stanza of a poem has a repeatable pattern of meter and rhyme and is normally division from the following stanza by a blank line.

Neither of the two candidates who had applied for admission to the Industrial Engineering Department were eligible for admission.

Choose the correct answer to complete the sentence. "The ______ way to do this was to expose the food to sun and wind"

Anyone reproducing copyrighted works without permission of the holders of the copyrights are breaking the law

The teacher taught her students to look careful to the left and the right at least three times before crossing the highway.

After Allan had searched for twenty minutes, he realized that his jacket had been laying on the table the entire time .

There is nothing more annoying than you are interrupted when you are speaking

You can see .................. moon in .................. sky at .................. nigh. 

The news today are always full of stories about people who are unhappy.

The surface conditions on Mars are the more similar with the Earth’s than those of nay other planet in the solar system

The factory was fined for ...... chemicals into the river.

In pools, goldfish are not just ornamental; since they feed on mosquito larva, they are also benefit.