单项选择题

______they invite you to speak, remain silent.
A. Even though B. Though C. If D. Unless
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Houses are __________ in sizes and many ways.
A. beautiful B. the same C. different D. similar
单项选择题
In order to open an account, you should _________.
A. have a permanent address
B. be a permanent resident
C. be able to drive
D. have a foreign student advisor
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