单项选择题

They built strong Walls round the town as a () against the enemy.

A. defense
B. defend
C. defeat
D. depend

相关考题

The kite flew () in the sky and everyone spoke () of it...

单项选择题The kite flew () in the sky and everyone spoke () of it.

A. high; high
B. highly; highly
C. high; highly
D. highly; high