This disaster ______ that people had no knowledge of first aid and they hadn’t known how to protect them-selves in face of danger.
I have experienced quite a number of cases ______ I really wanted to help but could not have anything to ______.
_______ of taking a bribe(贿赂), the official was being investigated.
—What about the student in your class, Mr. Wang?—The doctor said that ________ sleep caused him poor memory and poor concentration.
____________ many times, but he still couldn’t understand it.
--- Aren’t you the chief editor? --- No, and I ______________.