二氧化硅是酸性氧化物的原因是(   )

A．它溶于水得相应的酸

B．它对应的水化物是可溶性强酸

C．它与强碱溶液反应只生成盐和水

D．它是非金属氧化物

翻译题

1. The small island is _________(在亚洲东南部)．

2. In an English-speaking country, it is_________(练习英语的好地方)．

3. Maybe you fear that you won't be able to find _________ (吃的东西)in a foreign country.

4. It might ________(去动物园似乎很奇怪) when it's dark.

5. The temperature is almost ________(全年一样)in Singapore.

6. ________ (参观……最好的时间) Singapore in autumn.