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She called me on her return from New York.

on and on

without stopping

He went (= talked ) on and on about his girlfriend.

ОПСе 1 Ф / wrns / adverb

one time

I've only been to Europe once.

He calls us once a week (= once every week ) .

at some time in the past This house was once a school.

all at once

all at the same time, or suddenly People began talking all at once. All at once she got up and left the room. at once

( formal ) immediately; now Come here at once!

at the same time

I can't do two things at once. for once

this time only

For once, I agree with you.

once again ; once more

again; one more time

Can you explain it to me once more?

once and for all

now and for the last time

You have to make a decision once and for all.

once in a while

sometimes, but not often

once or twice

a few times; not often

I've only met them once or twice.

once upon a time

(used at the beginning of a children's story) a long time ago Once upon a time there was a beautiful princess...

once 2 Ф" / wrns / conjunction

as soon as; when

Once you've finished your homework you can go out.

опе 1 ф' / waii / number, adjective

the number 1

One and one make two (1 +1 = 2). Only one person spoke.

a person or thing, especially when they are part of a group

One of my friends is sick. I lost one of my books.

only

You are the one person I can trust.

used for talking about a particular time, without saying exactly when

I'll come over one evening.

one by one

first one, then the next, etc.; separately Please come in one by one.

one or two

a few

There are one or two things I need to do this morning.

опе 2 ф / waii / pronoun 1 used instead of the name of a person or thing

bought some bananas. Do you want one? "Can I borrow a book?" "Yes. Which one?"

The questions are hard — leave the ones you can't do.

( formal ) people in general; I Exercise makes one physically Jit. STYLE

It is very formal to use one in this way and it sounds old-fashioned. We usually say "you" for "people in general" and "I" when you are talking about yourself.

one an • oth • er / ,wAn s ' nAdsr / pronoun each other

We looked at one another.

one • self / wAn ' self / pronoun

( formal )

used with "one" for saying that an action involves the person doing it

One has to ask oneself if such action is necessary.

by oneself

alone; without other people

without help

one-way / ,wAn wei / adjective

allowing travel in one direction only a one-way street a one-way ticket

Look at round-trip .

on • go • ing AWL| / ' angouig / adjective

continuing to exist now It's an ongoing problem.

ОП . ion © / Чпуэп/ noun [ count, noncount ] a round vegetable with many layers and a strong smell. Cutting onions can make you cry.

Look at the picture at vegetable .

on • line / ,an ' lain / ( also on-line ) adjective, adverb

( COMPUTERS ) using a computer or the Internet Online shopping is both cheap and convenient. Reservations can be made online. Collocations The Internet connecting connect to/log on to/access the Internet/the Web go/be online/on the Internet using