当x=-1时,x+x2+x3+……x2005的值是( )。
-1
It is the second time I ______ to be monitor.
A. has been chosenB. had been chosenC. was chosenD. chose
赠与人的撤销权,自知道或者应当知道撤销原因之日起( )行使。
A.6个月内
B.1年内
C.2年内
D.3年内