The news that the scientists in China are trying the ways to reduce the fog and haze was ______ on the radio yesterday.
It wasn't until nearly a month later________I received the manager's reply .
______ is no possibility _____ the shy girl can win the first prize in the English speech contest.
Generally speaking, nobody will work with _____ has a bad virtue.
— Have you found your English book? — I am not sure ____ I could have left it.
The art center is ______ used to be Factory 789 and _______ millions of tractors were made.