—— What happened to the young trees we planted? —— The trees＿＿＿＿＿＿well, but I didn’t water them. 

We would have called a taxi yesterday if Harold ______us a ride home.

John,look at the time.       you stop playing the piano at such a late hour?

—Could I play computer games for a while, Mum? I’ve finished all my homework. —Oh, dear, if you _____.

 If I had been a little more careful, I _______the wallet behind.