Had he not come an hour earlier, he___the secret that his mother was always there.
Now then, children, it's time you_____________.
Children under six are not ___________to school except those of extraordinary intelligence.
--Oh, must you? Stay a longer. It's been such fun having you--__________. I've got an early start tomorrow morning.
Beijing government puts more than 700 million yuan to increase its green space this year; ____________ doubles the money provided last year.
I can guess you___________ your sweater inside out.