单选
What did you do ( ) the morning ( ) June 5
A.on ,of B.in ,on
Half of the population in China ( ) farmers.
A.is B.are
Forty percent of the lang here ( ) into rice fields.
A.has turned B.has been turned
Would you mind my leaving now?
A.No,go ahead B.Never mind C.It doesn't matter
给点理由