2010届南通英语二模卷2道选择

2010届南通英语二模卷2道选择
1.--Where have you been all day?
--I __ some former classmates and I couldn't get back until it was dark.
A.met B.had met
这题答案是A,为什么?请详解.
2.--Now the weight.Only 115.You'd better put on a few pounds.
--Well,actually I __ like a horse.
A.was eating B.have been eating
这题答案是B,为什么?请详解.