问题

Barrack Obama __________ President of the United States since 2010.
A:became a
B:has become a
C:has turned
D:has been
B:has become a
C:has turned
D:has been
正确答案是:
同类题型
It was on the festival occassions __________ thefamily got together __________ he missed his family.
_____________________– It’s windy and cold.
Would you like ______ shopping with me—I’d like to.
Have you ________?—No. I had the wrong number.
eople like to talk about generation gaps. Idon’t think there isin myfamily, though.