His English ________ a lot since he took the course.

Evidence has been found through years ofstudy______children’s early sleeping problems are likely to continue when theygrow up

The government of the United States began at once toinvestigate the case ______ a lot of students were killed.

My ______ / ‘fevrt / snack is potato chips.

下列诗句中与其他三项主旨不一致的一项是(　　)