is known to us all is the old scientist, for whom life was hard in the past, still works very hard in his eighties.
.Beginners of English can _________ quite well without learning any grammar rules.
.The _________ look on his face suggested that he hadn’t expected _________ would happen.
There is no _________ that the Great Wall of China is one of the biggest man-made projects on the earth.
.They _________ in spite of the extremely difficult conditions.
The old movie reminded them _________ the wonderful time they had spent together.