Tenses

I haven't known about it ___________

Let's begin our work __________

I have known him __________ childhood

We __________ each other for 10 years

It __________ still

When we __________ children, we __________ together

I __________ (not to see) her for a long time

I was anxious to see the place where I __________ (to spend) my childhood

She __________ (already | to gather) the necessary material and now she __________ (to write) her report

He never __________ (to be) here before

How long ____________ (to read) this book?

I __________ (not to meet) you for a long time