People planted trees on the waste hills_________ water and soil loss.

It is nice to see millions who had nothing but a record of misery and hungry ________ to improve their life and living conditions.[ ]

He ______ busy yesterday, or he ______ you with yourexperiment.

The murder happened _______ between nine and eleven last night.

Though he didn’t ________an important position, he got along very well with almost everybody and was trusted by most of his leaders.