单项选择题
The dolphins succeeded in keeping the whales at ______ long enough for the sea lion to reach the safety zone.
单项选择题 The magician ______ the frog into a princess.
单项选择题 He’s an artist, a scientist and a shrewd businessman all ______ into one.
单项选择题 Our civilization cannot be thought of as ______ in a short period of time.
