快

The clock is fast.

China has outpaced many countries in child education.

The new record saved 0.11 second off the old one.

My watch gains two minutes a day.

go ahead fast in one's studies; make rapid progress in one's studies

learn quickly; quick at learning

speak/talk fast

be swift-footed; run fast

The car is gaining speed.

How fast can your motorcycle go?

drive fast; speed

Hurry away/off to catch the train or you will miss it.

Hurry back to your work!

Go and fetch a doctor，and be quick about it.

Hurry in. It is raining.

Come on in!

Hurry up! The bus is leaving in a minute.

The sooner, the better.

We shall start off very soon.

I've been here for nearly ten years.

The old man is near upon 90.

The day is breaking.

It's getting dark.

It is going on for 10 o'clock. / It is coming up to 10 o'clock.

The train is about to leave.

The Spring Festival is drawing near.

It's going on (for) midnight.

be on one's last breath

be drawing to an end

She has a quick/nimble mind. / She is quick-witted.

be swift-handed

be quick in/on uptake

have a swift response; be quick in response

The axe is very sharp.

sharp knife; knife with a keen/sharp edge