As a result of destroying the forests, a large ________ of desert ________ covered the land.
Don’t ______ to spring-clean the whole house just because my mother is coming---there's no need to do that.
In order to get ________ better job of the two, he claimed that he could speak ________ second language, hoping it was an advantage over the other applicants.
He _______ English for four years before he went abroad.
Carelessness always contributes _______ car accidents. Therefore, drivers are advised to concentrate their attention _______ driving.
With a lot of difficulties _______, they went to the seashore and had a good rest.