将下列句子改为被动语态

①He plants a tree in the garden every year.（改成以树为主语的句子.）
-> A tree is planted (by him) in the garden every year.

②They ues the cups for holding the water.（改成以杯子为主语的句子.）
-> The cups are used (by them) for holding the water.

③James invented the morden bike in England.
-> The modern bike was invented by James in England.

④The workers built many tall buildings in the city.
-> Many tall buildings were built (by the workers) in the city.

⑤We should return the books to the library on time.
-> The books should be returned (by us) to the library on time.