世界上公认的第一台计算机是在（）诞生的
A.美国
B.法国
C.德国
D.英国
参考答案：A
-----What _____?
-----I______my key and can't open the door.
A．happened, lost
B．has happened, lost
C．happens, have lost
D．has happened, have lost
二母散3功效与作用
