China's first moon rover, Yutu, or Jade Rabbit touched the lunar surface at 9:14 a.m.on December 14,2013,  ________deep trace on the loose lunar soil.

The aim of the project is ____ patients to be more independent. 

When _________ different cultures, we often focus our attention on the differences without noticing many similarities.

______ of potential danger on late night visits to ATMs, she didn’t dare to go without his boy friend ______ her.

He dressed himself quickly, _____ his schoolbag and went to school.