It's a bike.It's a () bike.上面的写错了，是" It's a bike.It's an () bike. "

It's a bike.It's a () bike.上面的写错了，是" It's a bike.It's an () bike. "
It's a bike.It's a () bike.
上面的写错了，是" It's a bike.It's an () bike. "

It's a bike.It's a () bike.上面的写错了，是" It's a bike.It's an () bike. "
orange
It's a bike.It's an orange bike.

It's a bike.It's an (old) bike.

c look like 看起来像，主语是复数人称，look不加 s look likes 在这里本身就错误。主语是machines ，动词不能用动名词形式。