单项选择题

The defense works ______ long ago to keep the enemy away.

A．were built
B．has been built
C．had been built
D．was built
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单项选择题
Being a direct relative of the deceased, her claim to the estate was ______.
A．optional
B．compulsory
C．legitimate
D．prominent
单项选择题
—If you don t like the red coat, take the blue one.—Ok, but do you have ______ size in blue This one is a bit tight for me.
A．a bigger
B．the bigger
C．the big
D．a biggest
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