单项选择题

What can you do if the international line is engaged

A．Book a call.
B．Make a "person-to-person" call.
C．Call back outside office hours.
D．Keep on calling.
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单项选择题
The boys often used to throw a stone or two at the glasshouse because ______.
A．they hated Mr. Flowers
B．they only wanted to play a joke on Mr. Flowers
C．Mr. Flowers didn't let them watch flowers
D．they were naughty
单项选择题
How many hours is Moscow ahead of London during the summer
A．2.
B．3.
C．4.
D．5.
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