33.In the past few years,traffic problems (become) ________ more and more serious.填were becoming

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/06 02:04:03

33.In the past few years,traffic problems (become) ________ more and more serious.
填were becoming

have become (过去完成时态)
翻译:在过去几年,交通问题越来越严重了.

have become