When the teacher came in, all of us _______.
_______ they are twin brothers, they don’t look like each other.
The customers are pleased with the________of the restaurant.
Mr. Black is strongly _______keeping animals in the zoo, because he thinks animals should also have the right to enjoy freedom.
The number of the students in our school is about nine ____. ____ of them are boys.
—Do you think yesterday’s math problem was difficult? —Yes. I could ________ work it out.