Someone is knocking at the front door of your living room. You want to know who he is by saying ".........."

You lost the book you borrowed from the library last week. Your friend found it and he returned the book to you. You would say .....

You are looking for a new pair of shoes in the department store. A salesgirl is approaching you and she asks "what size of shoes do you wear?" You say

It is hard to ........ on my homework when people are talking loudly.

If I get a ........ score on my final exam, my mom said she would buy me a new wrist watch.

If you want to ....... from regular exercise, you should also eat healthy foods.

Men's broken leg is ......... him from going on the bicycle trip.

Sarah is a/an ......... at teaching yoga and I have learned a lot from her classes.

It is important to eat a ....... diet that contains fruits, vegetables, and whole grains.

The plan we made was too difficult so we could not ....... it.

Apparently my car could not be ......... after the accident left it destroyed completely.

Please .......... during the lesson, or you will not remember anything for the test

How can I ........ that from happening again?

If you just want to ........ through your workout to get it done, you will not make a difference in your overall health.

The immune system is a natural defense system that uses biological processes to fight ......... such as germs.

Vaccines prevent disease epidemics and are especially important for babies, whose immune systems are immature and ........... to infection.

This video is available in both English and Spanish audio, ......... corresponding closed captions.

Plate tectonics is the unifying theory that explains the past and current movements of the rocks at Earth’s surface and .......... a framework for understanding its geologic history.

The Pacific plate ......... oceanic crust, which is denser than the continental crust of the North American plate.