Opinions from other scientists might go like this: "Why should they want to get in touch with us? They may want to observe us only and __ (不干涉) the development of our civilization."
Mr. Angle says a heterogeneous swarm of robots will take care of the house instead of ______.
What is enclosed with the letter?
__ and the price list.
Competition is increasing among businesses which sell planes.
It may sound quite ridiculous but rather true that _______ (每个人在一定程度上都是迷信的).
Mary went to the cinema with her brother, ____ (对此我很吃惊).