单项选择题

John promised to keep his mother ______ of how things were going on when he studied in England.

A．to be informed
B．to inform
C．informed
D．informing
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单项选择题
My uncle ______ from the company because he was made to undertake dangerous assignments.
A．removed
B．emerged
C．resigned
D．shifted
单项选择题
We regret ______ you that the goods you ordered are out of stock.
A．to tell
B．telling
C．having told
D．to have told
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