第一句：I'll answer it.
A: The phone is ringing.
B: I'll answer it.
A: Who's that calling?
B: It's Xiao Wei. She asks us to go to her birthday party next Sunday.
第二句：Could you pick it up?
A: The phone is ringing. Could you pick it up?
B: I can't come to the phone right now.
接电话用“answer the phone”或者说：pick up。也可以说：I'll get it. 我去接。