The bus hit against a tree in the fog and __________to the deep valley, with ten passengers killed and twenty wounded.

So much of interest ______that most visitors simply run out of time before seeing it all.

Only when they were told the date of the wedding ,____ their daughter would get married.

Such a fierce dog __ that we had to wait outside before we could get into his yard．

________ you eat the correct foods ________ be able to keep fit and stay healthy.

Only that factory ____________ yesterday __________ this kind of machines.

He dressed up and went to the party as if ________.

---It is known to all that this factory pours lots of waste water into the Changjiang River every year.
---- _________ near my hometown.

Not until World War II ______ to use new chemical techniques to purify penicillin.

Jerry has promised to keep the secret, so he won’t tell anyone even though ______.