they saw two thieves in the street.they were surprised.(合并一句)
问题描述：
they saw two thieves in the street.they were surprised.(合并一句)
答
they were surprised when they saw two thieves in the street
答
they were surprised to see two thieves in the street.
答
They were surprised to see two thieves in the street.
They were surprised that they saw two thieves in the street.