The college education system should be reformed ______ it can follow the pace of the economic development.
The villagers, _________ had been damaged by the flood, were given help by the Red Cross.
It seems you need to apologize quickly ______ a good friend.
—What’s up? You look down. —I have piles of papers ______, but I type so slowly.
I don’t think it is teachers who ______ for giving students too much pressure.
Readers can ______quite well without knowing the exact meaning of each word.