下列各句中，没有语病、句意明确的一项是（ ）

Xishui lies _____the southeast of Hubei Province and ____the south of Luotian.They are good neighbours.— The population of Xishui is much bigger than that of Luotian.

The woman teacher hurriedly left the classroom as though ______.

在文中横线处填入下列语句，衔接恰当的一项是（ ）如果有黑洞撞向地球，那么________。当然，你听到的不是声波，而是引力波，因为________。当黑洞靠近时，引力波会“挤压”内耳骨，产生类似照相机闪光灯充电时发出的咝咝声。尽管天文学家认为，________，但正常情况下，________，因为引力波在广袤的宇宙中经过长途跋涉，抵达地球时强度已大大减弱。①引力波每时每刻都在影响着我们 ②你会听到它悄然逼近的声音 ③引力波是听不到的 ④声波在真空中无法传播

One of the few things you ______ sayabout English people with certainty is that they talk a lot about the weather.