Experts warn that global warming will cause dramatic climate changes, including more ________ floods,heat waves and droughts.[ ]

Though he is a manager of a big company, he makes ______ a rule to have supper with his family every day.

Leaves are found on all kinds of trees, but they differ greatly ________size and shape.[ ]

If people have problems, they should keep them to and ask for help.

Would you please keep silent? The weather report _______ and I want to listen