There is no doubt ________ only by lifelong learning can we keep up with the advancing society.
The poet compares the woman he loves __________ a rose.
Mr. Smith __________ to have a talk with you. He will be here in a minute.
My sister has never played tennis before. This is the first time she __________ to play.
It’s supposed that __________ miners live __________ life full of danger.
-- You ought to have given them some advice. --- , but who cared what I asked?