选1：John is paid by __________

a piece
b a piece
c the piece
d pieces

选哪个》？？为什么？？

选1：John is paid by __________ 选择第13题：John is paid by __________ Who is John --who is John? John is a university student. Buddy, where is john？翻译 打电话找john时，可以说“is john there”,那么可以说“is john in”么？ The book is well worth what I paid for it . 看补充 John is a taxi driver "1st Installment is paid in full for VET"怎样理解?其中"VET"是什么意思?拜托高手帮帮忙!