A．ought
B．drought
C．thought
D．bought

We should ______ attention ______ spelling.A．pay... onB...

单项选择题We should ______ attention ______ spelling.

Something bad has happened ______ the family last night...

单项选择题Something bad has happened ______ the family last night.

The secretary worked late into the night, ______ a long...

单项选择题The secretary worked late into the night, ______ a long speech for the president.