People have invented many labor-saving devices to help women with housework.

A. Many labor-saving devices have been invented to help women with housework.

B. Many labor-saving devices are invented to help women with housework.

C. Many labor-saving devices are being invented to help women with housework.

D. Many labor-saving devices were invented to help women with housework.

Đề luyện thi Tiếng Anh vào 10. Đề 2(2021)