用所给单词的正确形式填空。

1. He was fast enough         (catch) up with the runner.

2. There is even         (little) milk in this bottle.

3. It took me two hours        (wash) all of my dirty clothes.

4. We must stop them from         (throw) litter into the river.

5. There are now         (live) things on other planets.

公猫去势时，切口应在阴囊的（）

A.颈部

B.底部

C.左侧

D.右侧

E.阴囊前方