Complete the text using the Past Simple of verbs in the box

— Where are we ( going) now, Tom?
— We are going to our glade, Ann. There we (will have) a picnic.
— (Isn't) it our glade, Tom? But there (is) so much litter here!
— Somebody ( left) all this rubbish in such a beautiful place! Just look at these empty cans and bottles!
— And look, Tom, somebody (has not put out) a campfire! It (is still burning)!
— Well, this place ( looks) horrible. And this (is) our favourite place for having picnics!
— Right. But we (have never left) rubbish here. We (always picked) the wrapping papers and cans and ( carried) them to the nearest waste bin. I think we (have to clean) away all the rubbish first.
— OK. Then I (will put out) the fire.
— And I (will pick) up all the rubbish. 

1. The system (removing) the largest part of the waste products of the body is called the urinary system. 2. The capsule (surrounded) by perirenal fat is called the adipose capsule. 3. The urethra is a tube (coming) from the bladder. 4. Each renal artery branches into many small arteries (called) arterioles. 5. Ureters are muscular tubes (lined) with mucous membrane. 6. The agents (increasing) the resistance of the organism to an inflammatory process are: rational diet, balneo- and vitamin- therapy as well as immunotherapy.