________ energy, many factories make products with recycled materials.
A.Save B.To Save C.Saving D.Saved
Lao She ________ "people's artist" because he always told stories of common people's lives.
A.calls B.will call C.is called D.will be called
EL Capitan, about 3,000 feet high, is one of the world’s ________ mountains to climb.
A.hard B.harder C.hardest D.the hardest
My dad ________ at least 10,000 steps every day.
A.walks B.is walking C.will walk D.has walked
Things ________ much easier if we work in groups.
A.be B.were C.will be D.have been
— ________ camera is this, Lingling?
—I think it's Tony's. He was taking photos here just now.
A.What B.Where C.How D.Whose
