“中部高、四周低”是亚洲地形的一大特征，受其影响亚洲河流的特点是（   ）

孙中山是伟大的中国民主革命的先行者。1905年8月，在他的推动下，成立的中国第一个全国性的统一的资产阶级革命政党是（   ）

根据下面对话情景，在每个空白处填上一个适当的单词，使对话的意思连贯、完整。

A: Hi, excuse me.

B: Yes. How can I ____  you?

A: I'm new in town. Where is the Science Museum, please?

B: Go along Center Street and ____ right on Main Street. Then you'll see it on your left. It's across from the park.

A: Is it far from here?

B:____ , it's quite far from here. And you can take a bus.

A: Which ____  can I take?

B: The No. 5 bus.

A: Is____ a bus stop near here?

B: Yes, there is. I can walk with you.

A: Oh, that's great! Thanks so much.

B: No problem.