用来解决两国间的债权和债务的协定是（）。
A.支付协定
B.贸易协定
C.国际商品协定
D.国际商品综合协定
参考答案：A
His name is Jim Smith. Smith is his ________ name.
A．first
B．family
C．English
D．full
When Xie Lei made progress in her study abroad, her parents encouraged her to ____.
A．make it up
B．keep it up
C．build it up
D．lift it up
