My deskmate is still a puzzle to me; at one moment he is quiet while at another he _____ be quite active.
The pianist ______ a love for music when he was a little boy.
Jack, look! Everybody is doing homework quietly. ______ you make a noise in class?
There are plenty of vegetables in the fridge. You needn’t buy ______.
—Sorry, I made a mistake again.—______. Practice more and you’ll succeed.
In peace, the Red Cross is expected to send help ______ there is human suffering too.