Barrack Obama __________ President of th
题型:选择题
问题:
Barrack Obama __________ President of the United States since 2010.
A.became a
B.has become a
C.has turned
D.has been
Barrack Obama __________ President of the United States since 2010.
A.became a
B.has become a
C.has turned
D.has been