The terrible drought has captured worldwide attention. As responsible citizens, we must never ______ the terrible situation that our common home is faced with.

Shall I turn the heating on?—Sure, it’s so cold in here. I’m freezing.

What a mess(杂乱)! Tony, you should ___________ your things to keep the room clean.—OK, Mum! I’ll do it at once.

The meat smells _______. Maybe it goes _______.

There is ___________ “s” and __________ “u” in _______word “student”.