孩子们喜欢在大树旁玩耍。

The children love to play ___by the big tree.

这幅画是由一位年轻艺术家创作的。

This painting was created ___by a young artist.

我们可以通过电子邮件保持联系。

We can keep in touch ___by email.

请在下班前完成这份报告。

Please finish this report ___by the end of the workday.

这块地毯长3米，宽2米。

The rug measures 3 meters ___by 2 meters.