---How long did it _____ you to work out the difficult maths problems?---I ______ about half an hour on it .

Although many great people ever failed, they never_______ and managed to succeed.

We still couldn’t decide _________ with our difficulties in learning English.

—Why do you ____ the radio? I can’t hear the light music clearly. —I’m afraid of waking the baby up.

Mike     his computer and checked his e-mail.