—What about the student in your class, Mr. Wang? —The doctor said that sleep caused him poor memory and poor concentration.
There aren’t many seats left for the concert; you had better make sure ____ two today.
Examination compositions, together with most business letters and government reports, are the main situations ____ formal language is used.
If you don’t keep the meat in the refrigerator on such a hot day, it may ____.
_____ the teacher's suggestion, Tom finally found a way to settle the problem.
Some 25,000 people were reported ______ in the ever recorded worst earthquake in Iran which occurred late this month.