单项选择题

It was when he began to make the new experiment in 1908 ______ such an ambitious plan.

A．had he
B．did he have
C．that did he have
D．that he had
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单项选择题
College students can easily ______ from one curriculum to another, from one institution to another, as suited to their needs.
A．move
B．transfer
C．transmute
D．travel
单项选择题
No one believes what the new director ______ to have achieved.
A．declares
B．confirms
C．states
D．claims
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