In order to finish the task on time , we can’t to waste a single minute.
A survey of the opinions of experts___that three hours of outdoor exercise a week___good for one’s health.
When asked why he went there,he said he was sent there___for a space flight.
Scientists are convinced___the positive effect of laughter___physical and mental health.()
Don’t take too much of the medicine;it does you more harm than good if you______.
—Will you join us in the game? —Thank you,_______