________ used to ________ a post office near my house．（ ）
| A． |
There； be |
B． |
There； have |
| C． |
It； be |
D． |
There； having |
We have entered a world where robot operations become true with 5G technology．
Hard to believe! Scientists are full of which leads to great changes in our life．（ ）
A．attractionB．invention
C．positionD．contribution
Who is at the door？
A deliveryman（快递员） or wanting to sell his new products．（ ）
A．everybodyB．anybodyC．somebodyD．nobody
It's pity that many wild animals are now in danger．Please have pity on them since they are part of our big family．（ ）
A．a；/B．a；aC．/；aD．/；/
Through 5G，people in two different cities can even "shake hands" on the same screen．
_________（ ）
A．What a mess!B．Don't mention it．
C．With pleasure．D．Wonderful indeed．
Kunqu Opera is_____thought to be one of the symbols of Suzhou． Don't miss it during your stay here．（ ）
A．hardlyB．widelyC．suddenlyD．badly