1¡¢The manager put forward a suggestion ____ we should have an assistant. There is too much work to do.

A.whether           B.that              C.which             D.what

2¡¢The 70th anniversary military parade demonstrates the fact to the whole world ________ China has made great progress in the past few decades.

A. where            B. which            C. why              D. that

3¡¢I am impressed with China's commitment to its climate goals, evidenced by the fact  ________ China has met its 2020 targets three years ahead of schedule.

A. that             B. which            C. what             D. where