Though the road covered with snow was very smooth, the old man smilingly ____ to be helped by others across the road.
____________ the Roman numerals, the Arabic numbers are rather simple to use.
___________ a reply, he decided to write again.
This is the material ________ in the laboratory tomorrow morning.
.I’ll go to bed now. I am not ________ up late.
.The old man said the accident ___________ carless driving, so a lot of money should be paid by the driver.