Kate, have you ______ the party It's time to go now.
A. heard from
B. been interesting in
C. waited for
D．got ready for
己知在298K时的标准条件下，反应2Fe3++Sn2+=2Fe2++Sn4+正向自发进行，若通过原电池进行该反应，则下列叙述中正确的是（）。
A. 铁离子电对构成了原电池的正极，发生的是还原反应
B. 锡离子电对构成了原电池的正极，发生的是还原反应
C. 铁离子电对构成了原电池的负极，发生的是还原反应
D. 锡离子电对构成了原电池的负极，发生的是还原反应
You business interfering with my affairs.
A. have none
B. have no
C. have none of the
D. have nothing like
I was just going to cut my rose bushes, but someone ______ it. Was it you
A. has done
B. had done
C. would do
D. will do
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