They found an ancient metal tool whose function is still unknown
查看答案
guard against是防范
A. 对
B. 错
They turned out ( to be ) successful
A. 对
B. 错
I rejected the idea of England because it was not exciting enough
A. 对
B. 错
It has been found that the hand scan works well in the college gym.
A. 对
B. 错
微信支付 
支付宝支付