There’s no doubt _____enough concern must be paid to the problem of the stayathome children.
Now ______ good many old people are also fond of playing games on ______Internet.
Not until the 11th century, when a young lady brought a fork to Italy, _______.
On August 12,2009, Typhoon Morakot swept across Taiwan island, _____ a lot of villages _____.
It is so heavy a box _____ no one can move.
—Why does the lake smell terrible? —Because large quantities of water _____.