请根据题中空格后的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。
1. The weather report said that the temperature would fall ________ (在......下面) zero.
2. The museum has lots of amazing things. It's ________ (值得) a visit.
3. I have a weight problem and it's ________ (必要的) for me to change my diet and take more exercise.
4. The girl likes the handbag very much, but she can't ________ (have enough money to buy or to do
something) it.
5. Our teacher tells us to ________ (do something very often to improve one's skills) our spoken English
every day.
6. It is said it will rain this afternoon. You'd better take an ________with you.
7. Anny did her homework so that she didn't make any mistake in it.
