Before testing this method on patients, Dr. Baker had         tests for two years
on three hundred dogs.

They _____ coal, and had to _____ wood.

This necklace is beautiful but it doesn’t ____ the color of your hair.

—— What do you think of my speech? Being watched by so many people,
I always feel nervous.
—— You ______ quite well, though.

Some of the students have already learned enough English to _____
a conversation with an English speaker.

—— Do young people in that country like to be engaged in teaching?
—— Not really, for teachers strongly feel that school systems____ them ____.

I wonder how it ________ that they made such rapid progress.

Readers can ___ very smoothly without knowing the exact meaning of each word.

The nurse treated the naughty boy very kindly, but her patience ____ at last.

The boss _____ 30 dollars from my salary without any good reason.