1.Radar(雷达) uses radio waves to e----aircraft ,ships to see

1.Radar(雷达) uses radio waves to e----aircraft ,ships to see far into their surroundings even at night and in bad weather
2.Every citizen o--- to obey fraffic rules.
3.Doctor Wang finished two o--- this morning.
4.I know several different kinds of word p--- softwave.
5.P--- this button to start the engine.
6.With the development of the Internet,college students take more o--- lasoons.
7.The keyboard was c--- to the computer.
8.Our taecher is f--- with Chinese ancient history.
9.Let's start t--- up the room right now.
10.Don't worry.We have everything under c---.
11.This washing machine is the latest m---
12.He is p--- his speech for the meeting tomorrow.
13.One of the reasons I came to britain is to p--- my English.
14.I remember with p--- my last visit to Hawaii in August 2010.
15.The most widely used tool on the Internet is e--- mail.
16.Cherish the time you have,and the m--- you share...being friends with someone is not an opportunity but a sweet resporisibility.