Amy and Sam ____ bananas. ( )
A: like
B:likes
C:liked
D:doesn't like
完成句子(10分)
已知数列{an}中,a1=2,前n项和为Sn,且点P(an,an+1)(n∈N*)在一次函数上y=x+2的图象上,则 1S1 + 1S2 + 1S3 +…+ 1Sn =( )