Present perfect continuous

1) I want to buy a new smartphone.
I started saving for

Sheila is exhausted! She’s been singing non-stop ________ three hours.

for

She’s been working for the same company _________ eleven years.

for

The manager has been sitting at his desk _________ early this

The manager has been working _________ two hours on the new

My son has been skiing ________ he was three years old.

She’s tired because she’s been driving ________ this morning.

since

She’s been reading to her son ________ half an hour.

for

They’ve been married _________ last Spring.

since

They’ve had their dogs ________ 2001.

since

Ever __________ I was a child, I’ve loved reading books.

since

Complete the following sentences using the present perfect continuous tense form