I ______ an old letter while I was searching my drawer.
#66344
A
came up
B
came across
C
came on
D
came about
推荐题目
They thought about it for a long time, but still could not ______ a solution.
#66797
A
come over
B
come along with
C
come out
D
come up with
Many approaches have been _______ to control the spread of H7N9 Bird Flu. 
#64838
A
adapted
B
employed
C
negotiated
D
accessed
Everything he said then was _____ by what happened later.
#81805
A
identified
B
signified
C
noticed
D
verified