“On no account _____ to feed the animals,” the warning can be seen on the signboard on front of every cage (笼子).
It worried Mary a lot__________she would pass the college entrance examinations.
__________ caused the accident is still a complete mystery.
__________that they found an unusual plant in the forest.
__________we can’t get seems better than__________we have.
—Do you still remember__________he was taken to the hospital?—Yes,he was sent to the hospital in Mr Smith’s car.