—What about the student in your class, Mr. Wang?—The doctor said that sleep caused him poor memory and poor concentration.
Jack, who pretended, heard, however, every word that was said.
The old man __________ in Tibet for two years as a volunteer teacher;it is an experience he often mentions.
Qian Xuesen tried many times _________ he found the solution to the puzzle about space technology.
Thosethe exam cheat mustanother exam tomorrow afternoon.
He admitteda lie in order to avoid.