2 . Have you ever seen a chameleon (变色龙)? How large is it? Scientists have found a kind of very small chameleon. It is so small that it can sit on your fingertip. Scientists have only found two of them-one male(雄性) and one female.

The scientists from Germany and Madagascar found the new kind of chameleon in the rainforests of Madagascar. It is called Brookesia nana, or B. nana. It is the smallest known adult animal among the world’s over 11,000 reptile species(爬行动物). The rainforest in Madagascar are home to many animals. Before B. nana, the world’s smallest known reptile was another chameleon called Brookesia micra. It grows to be about 2.9 cm long. The female B. nana was about the same size. The male B. nana, however, was much smaller. It is 2.2 cm from head to tail. This is unusual for chameleons, because usually the males are larger than the females. Unlike some other chameleons, B. nana isn’t able to change its colors. The skin(皮肤) of it is a mixture of brown colors.

1. The passage is mainly about ________.

A．the Brookesia nana

B．one female animal

C．the small finger

2. Who found the new kind of chameleon in the rainforests of Madagascar?

A．The scientists from Germany and Madagascar.

B．The scientists from the UK and Canada.

C．The teachers and farmers from Madagascar.

3. How many different kinds of reptile species are there in the world?

A．one.

B．Two.

C．Over 11,000.

4. How long is the male B. nana from head to tail?

A．2.0 cm.

B．2.2 cm.

C．2.9 cm.

5. Can B. nana change its colors?

A．Yes, it is.

B．No, it can’t.

C．It wasn’t mentioned.