The poor ________ living in the mountain ________ top is covered with green trees.

just can’t imagine how people living here __________ the polluted environment. — Something must be done to change this situation.[ ]

Our class _______ of thirty-two boys andtwenty-three girls.

More than seven in ten get angry ________ to wait longer than one minute for a web page to be downloaded.

See The strange man I saw yesterday _____around my house again. Should I call the police