______ have you stayed in thisschool ? —Forthree years.

When electric cars become______, we’ll need to build more charging stations. [ ]

下列各句中，加点的成语使用恰当的一项是

Tony Smith is a tall boy. We call____“Big Tony”.

It is said that if a mirror is broken for no reasons, bad luck is likely to strike, but I really ____it. [ ]