In the past decades, sea ice ____ in the Arctic as a result of global warming.[ ]

Those who are not ___ with the progressthey ‘ve made will have greater success.

When I meet new words while reading, I always ________ them _________ in the dictionary.

Jane isn’t here today. Is she ill–______________ . I saw her at the doctor’s this morning.

Every year, _______ migrant workers(农民工) come to our town to find jobs.