New Words：

natural [ˈnætʃrəl] adj.自然的；天然的；天生的；本能的

Sample Sentences：

It's natural to worry about your children.
My hair soon grew back to its natural colour.
It's difficult to look natural when you're feeling nervous.
His natural mother was unable to care for him so he was raised by an aunt.

nature [ˈneɪtʃər] n.自然；本质；大自然；本性；自然界

New Words：

poisonous [ˈpɔɪzənəs] adj.引起中毒的；有毒的；分泌毒素的；能毒伤人的
insect [ˈɪnsekt] n. 昆虫；虫子

Sample Sentences：

This gas is highly poisonous.
A lot of poisonous waste water comes from that chemical factory.

Birds and insects are natural enemies.
There is an insect crawling up your back.

natural [ˈnætʃrəl] adj.自然的；天然的；天生的；本能的

New Words：

dragonfly [ˈdræɡənflaɪ] n. 蜻蜓
mushroom [ˈmʌʃrʊm] n. 蘑菇

Sample Sentences：

A giant dragonfly was sitting on my bed.
The dragonfly feeds on mosquitoes and flies.

There are many types of wild mushrooms.
Some mushrooms are good to eat; some are poisonous.

poisonous [ˈpɔɪzənəs] adj.引起中毒的；有毒的；分泌毒素的；能毒伤人的

New Words：

prefer [prɪˈfɜːr] v. 较喜欢；更喜欢；宁愿；宁可

prefer doing sth to doing sth 喜欢（做）…胜过（做）…/比起（做）…，更喜欢（做）…

Sample Sentences：

I much prefer cats to dogs.
Which one do you prefer, an apple or an orange?
I prefer staying at home to going out in such a cold day.

New Words：

bumper [ˈbʌmpər] n.（汽车头尾的）保险杠

Sample Sentences：

I want to ride in the bumper cars.
There is a hole in the bumper of my car.
The cars were bumper to bumper on the road to the coast.