“I’m sorry you failed the test.” “Frankly, I wish I ____ harder.” 

If the water level has raised a little higher, the dam would probably have broken

If you make a five-days trip across the Atlantic Ocean, your ship enters a different time zone everyday.

I put my new book of zoology here on the desk a few minutes ago, but I cannot seem to find it.

Our civilization is so commonplace to us that rarely we stop to think about its complexity

The number of students attend the class dwindled until only two remained.

When you go to........... store, please buy........... bottle of ...........chocolate milk and........... dozen oranges. 

Every year, thousands of tourists visit ……... Nile River.

Once the scientist had figured out the precise path of the comet, he is finding that he was able to predict its next appearance.

Choose the correct answer to complete the sentence. "______ they stopped deforestation, it might help prevent global warming"

To save the California condor from extinction, a group of federal, local, and privately organizations initiated a rescue program.

Residents in some cities can call an electrical inspector to have the wiring in their house to be checked

Choose the correct answer to complete the sentence. "This process of cutting down trees is ______ ‘deforestation'"

Most country music songs are deeply personal and deal with themes of love, lonely, and separation.

I thought this book was rather dull at the first, but I’ve changed my mind.

Lunar eclipses happen only if the Moon is full, but they do not occur at an every full Moon.

Our primary goal is to teach students to discover the truth. But we have also other aims, such as providing them with knowledge or to teach them to work consciously

The pace of living is too fast for me in this town. I need to move to a village, where everything happens more slower.

After George had returned to his house, he was reading a book.

Many scientists contributed to the development of television, whether no one can be said to have invented it.

Geologists find it useful to identification fossils in a rock sample because certain assemblages of species are characteristic of specific geologic time periods