【题目】－Did you do well in the math examination yesterday?
－I'm afraid not. Some problems were not as easy as they________.
A. supposed
B．supposed to be
C．were supposed to be
D．were supposed to
在线课程【答案】C
【解析】be supposed to do意为“应当；理应”，承前省略的不定式后有be时，不定式符号to后要保留be，故选C项。