These two kinds of cell phones differ ________ shape, but they are similar ________ each other in some functions.

Tom has been working for three days，with only five hours’ sleep each day!—________ he looks so bad.

The classroom is crowded with children_____ have poor eyesight, all of ____ interested in painting.

The air in Taizhou is getting much ________ now than a few years ago.

Tom _______ up early. But now he gets up very late.