The light in his office is still on. Do you know ?—In order to prepare for tomorrow’s meeting.

is your cousin?–She’s fifteen years old.

.Many scientists believe that now we can study the behavior of a three-year-old child to see ____ they will grow up to be criminals.

What’s the matter ________ your sister? —She has a________ cold.

The song I Believe I Can Fly tells us that believing in _______ is very important.