英和和英

a window of opportunity

a heaven‐sent opportunity

the best opportunity

It's now or never.

a good chance

an important occasion

a chance in a million

a glad occasion

a fit opportunity

an attractive opportunity

to miss an opportunity

grasp a chance

a chance in a million

Last call!

to miss an opportunity―let slip an opportunity―throw away an opportunity

a lost opportunity

A good opportunity has presented itself.

to take advantage of a good opportunity

have an opportunity

What better chance could one wish for?

to get a chance―find an opportunity

to miss an opportunity―let slip an opportunity

Give a chance

“Take time by the forelock.”【イディオム・格言的】

a chance

take an opportunity

a situation offering opportunities

such a chance as this

this occasion

to avail oneself of an opportunity―make the most of an opportunity―（小言などを言うためなら）―improve the occasion