China’s central government has____that it has sent a team to look into the use of “slave labor” at illegal brick kilns(窑) in Shanxi Province.

The U.S. government on Wednesday ________ former Commerce Secretary Gary Locke as ambassador to China, making him the first Chinese-American ever to take the post.

.Nobody noticed the thief slip into the house because the lights happened to_____.

The students were sitting in the classroom with their eyes　　　on the teachers.

So many brand marks _____each other that we had great difficulty finding the one he referred to.