Rewrite the sentences correctly.请用祈使句改写下列句子。 1 To go upstairs right now! 2 Please not talk so loudly. 3 First open the box. 4 Not talk to John. He is busy. 5 Taking a sweater, it's cold out there.
【单选题】AERONAUTIC SYSTEMS, INC., the Berlin-based company also known as AeroSys, has made an agreement with three of the world's major international airlines to provide a satellite system for voice and data ...