问题
选择题
________he was a rising film star in China, but now few young people know him.
A．At a time
B．All the time
C．At one time
D．At times
答案
答案：C
这题考查词组：At a time一次，.All the time一直，.At one time曾经，At times有时，
根据句意：他曾经是中国的崛起的电影明星，可是现在很少年轻人认识他，选C。