Thepolice___________emergenciesinjustafewminutes.[ ]

Look! That’s Amy. —It _______ be her. She’s gone to Xi’an.

One reason for her preference for city life is ___________ she can have easy access to places like shops and restaurants

At last, she thought of an idea to kill the spiders.

When shall we hold the meeting?—It________be better to put it off until next week. [ ]