问题
选择题
The number of speech pathologists(who help people who have problems speaking) double by the year 2012.
A．is expected to
B．are expected to
C．expects to
D．expect to
答案
答案：A
题目分析：考查词组和主谓一致：句意：据估计语言病理学家的数量到2012年将会翻翻。Be expected to do据估计…，排除CD，另外主语是the number of…的数量，谓语用单数，选A。