—Excuse me. But I want to use your computer to type a report.—You _____have my computer if you don’t take care of it .

Very loud noise＿＿＿＿＿make people ill or drive them mad. 

So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ . 

 It's high time that we students ______ even harder at our lessons as the national entrance examination is coming nearer. 

Driving on the highway ______ be very dangerous, so you ______ be too careful.