With the rapid development of medical science, we ___ more new drugs used in the treatment of cancer

I can hardly believe such a little boy gets up______ 5:00 ______ 6:00 every morning.— What a hard-working boy!

__________ is troubling me is __________ I don’t understand __________ he said.

usually turn on the radio to listento evergreen songs, which _____ them of their past

Tom, it’s time to go to bed.—OK, Mum. ________.