Choose the letter A, B, C or D to complete the sentences. " If you don't keep silent, you ________wake them."

While they were away at the beach, they allowed their  neighbors use barbeque grill.

The geology professor showed us a sample about volcanic rock which dated back hundred years.

Mercury is not often visible because it is so near un to be seen.

All the schools throughout of the country underwent the educatio reform.

Gold, silver, and copper coins are often alloyed whit harder metals to make them hard as enough withsta wear.

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

From the airpl, passengers are able to clearly see the outline of whole island.

The knee is more likely to be damage thanther joints because it subject to tremendous forces during vigorous activity.

Marta being chosen as the most outstanding student of her campus made her very happy.

............. extremely bad weather in the mountains, we are no longer considering our skiing trip.

Salt was too scarce and precious that it was used as money .

The winter storm that raced through the last two day moved east today

According to most psychological studies, body language expresses speaker’s emotions and attitudes, and it also tends to affect the emo and attitudes of the listen 

His roommate is not very clever student, but he certain works very hard indeed.

I hadn’t understood his directions. However, I asked him to repeat he’d said.

Muscles are essentially made up by elas fibers that lend flexibility to the body

Most presidential candidates have their names print on the ballot in the New Hampshire primary election because it is customarily he first one in the nation, and winning it give a good chance to be nominated by their parties

The public ceremoniesof Plains Indians are lesser elaborate than those of the Navajo in the Southwest.

Neither I nor she_______ seen the film before. 

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and cures.