问题
选择题
---- “I haven't heard from Henry for a long time.”
------ “What do you suppose_____ to him?”
A．was happening
B．to happen
C．has happened
D．had happened
答案
答案：C
此题容易误选B，认为动词suppose后接动词用不定式。正确答案应是C，其中的do you suppose是插入成分。