"How long has he been reading?"
"He _____________ (read) for 3 hours.

The playground is full of rain water. It _______ (rain) for almost 3 hours now.

Boom, where have you been? I _______ (look for) you for the last 20 minutes.

She ________ (work) very hard all this week. She needs a rest.

"You're very late. We _______ (wait) for 30 minutes now."
"I'm very sorry. I got up late this morning."

"I'm sorry. The traffic is very bad.
_______(you/wait) a long time?"

I started collecting stamps last month. I __________ (collect) stamps for 25 days now.

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