补全对话
A:Hello, may I speak to Kate, please?
B:Speaking.
A:Hello, Kate! This is Lily speaking. It's Sunday tomorrow. ____
B:Nothing much. Do you have any ideas?
A:The spring has come. I hear many flowers in park bloom together. It must be very beautiful.____?
B:Good idea. My sister Lucy also likes flowers very much. Let's invite her to come with us.
A:Why not? ____. Sa we can take some wonderful photos.
B:Great. I like taking pictures. ____ ?
A:Let's meet outside the school gate at half past nine in the morning.
B:How shall we go there?
A:Let's go there by bike.
B:Oh, my bike is broken. ____?
A:All right. See you!
B:See you!
=8a-3.则a的值是( ).