No one can imagine the difficulty he had _______ his son to get rid of the habit of playing computer games.
The UN member states ______ positively and quickly after the quake rocked Haiti.
The number 5.12 is a special number, ______I think, that will be remembered by the Chinese forever.
“Attention, please. Whoever can answer one of my questions______ receive a prize”, the teacher said in class.
— ______you write so well? —By reading and keeping diaries every day.
—I called you many times yesterday morning, but I couldn’t get through. —Oh. My brother ______on the phone all the time!