从方框中选出最佳选项完成下面的对话。

A: Hello! This is Wei Hua. May I speak to Li Feng?

B: ____ 
A: Hi, Li Feng. Would you like to visit Fujian Tulou this Sunday?

B:Yes, I'd love to. ____   

A: How about half past eight?

B: All right. How can we get there?

A: ____It takes about three hours to get there.

B: Oh, Why not invite Mike? Maybe he wants to go with us.

A: ____I'll call him later. And let's meet at t he bus station at 8:30 in the morning.

B:OK. ____

A: See you.

墙体的竖直性是房屋质量的重要指标，在建造房屋时，建筑工人常常利用如图所示的重垂线检测墙体是否竖直，这是运用了重力的方向是____，如图中所示的墙体向____（选填“左”或“右”）倾斜.

下列函数中，自变量x的取值范围是x≥3的是(  )

读 《游岳阳楼记》，作者为什么认为自己就“真可哭也”？