er I think of my childhood, I’llalways feel that the period of free time seem to have passed ________

What’s the secret of success, Dad–More time and effort, ________ you’ll make it some day.

If you don’t know what this means, ________ the dictionary.

I haven’t seen that foreign film，but it is ________ that it is worth seeing.[ ]

We look forward to the day when the car will be replaced by some less dangerous_______ of transport.