By the end of 2020 china much stronger and richer.

A.will become
B.would become
C.is becoming
D.will have become
出自:兰州理工大学-机械设计制造及其自动化-大学英语2

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块