— I wonder _______.

— I'm afraid we'll be late.

    The US is the fourth largest country in the world. It's smaller than Russia and China. Washington DC is its capital. But it is a quiet city.New York is the biggest city in America and it's one of the biggest cities in the world. It is the east of the US and at the south of the Hudson River(哈德逊河).A large part of the city is on Manhattan Island(曼哈顿岛), a big island in the river. New York has a larger population(人口) than Washington DC. In New York, we can see a famous statue, the Statue of Liberty(自由女神像)

⑴⑵⑶根据短文内容，选择正确的单词或短语把句子补充完整；⑷⑸根据短文内容，选择正确答案。

下列气体中，既可用浓硫酸干燥，又可用固体NaOH干燥的是（　　）

开元年间（716—741）政局稳定，经济繁荣、文化昌盛、国力富强的原因不包括（    ）

“己所不欲，勿施于人”。意思是自己不愿意做的事情，不要强加在别人身上，当你遇到挫折和委屈时，应该（）