At the shopping centre, she didn’t know what _____ and ______ with an empty bag.
The building is carefully designed so that everyone can leave the building safely if an accident .
Nowadays many parents from the countryside cannot afford to educate their children, because the school are too high.
We can’t against other countries in trade if we don’t develop our national economy(经济).
The huge statue(雕像) of the former leader was pulled down, and it lay on the ground _______ .
It’s important for us to use a word or phrase according to the in language studies.