Computers are so popular in our country that every pupil knows _____ e-mails.
The policeman asked the child so that he could take him home.
Would you mind _______ a noise here? My baby is sleeping.
_____ he was tired , ____ he didn’t stop working .
Please _______the light when you leave the classroom.
—Can you answer this question? -- Sorry, I can _________ understand its meaning.