单项选择题

______ from the sun ______ we get light and heat.

A．It was ... that
B．It is ... that
C．It was ... which
D．It is ... which
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单项选择题
When ______ London from abroad, dial 1, not 01.
A．being telephoned
B．telephoning
C．having telephoned
D．telephoned
单项选择题
______ my work, I'll go with you.
A．After to finish
B．After finish
C．After finishing
D．After the finish of
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