She is a quiet girl at school,but sometimes she _____be very naughty.
The science of medicine, _______ progress has been very rapid lately, is perhaps the most important of all the sciences.
He is _______ to get there in time if he starts right now.
—Which day do you think is all right to our next meeting? —You make _______,_______ day is all the same to me.
_______,but he still could not understand it.
It was very kind of you to do the washing up, but you _______ it.