Question

they have a new bike each(同义句转换）

（ ）of them（ ）a new bike.

Answer 1

Each, has
原句后面有个each,就证明了这个they是两个人,因此,两个人的句型转换我们可以用both或者each
但是,在这我们并不能用both,因为如果用both就变成both of them have a new bike.意思就变了他们两个人共同拥有1辆车.就与原句的each(各人各自有1辆)的意思了.
因此这个答案就用each和has.
因为each of加名词后面的谓语动词就用单数.

Answer 2

Both have 翻译成他们两人都有一辆新的自行车~

Answer 3

each of them has a new bike.

Answer 4

Each has

Answer 5

both--have