We'd better eliminate junk foods from our kitchen and keep a variety of high-quality foods_____ at all times.

Theaeroplane____shewastravelingwasdelayedforthreehoursatleast.

Finally,the thief handed everything ____ he had stolen to the police.

Mary was the girl ____ (在初中我和她一起看电影的)。

Humanbeingsaresuperiortoanimals_____theycanuselanguageasatooltocommunicate.