B4

The name Pymatuning is of Indian origin and means ‘Crooked-mouthed man’s dwelling place, referring to an ancient Red Man who was not famous for truth telling.
(относящийся к …)

REFER

B5

Before the glaciers swept across northwestern Pennsylvania, the Pymatuning was what it is today — a lake.
(past simple, (sweep – swept - swept), т.к. ледники прокатились по северо–западной Пенсильвании в определённое время в прошлом)

SWEEP 

B6

However, later the lake was reduced to a swamp by the great ice movements which gouged out the hills of the area and filled in the valleys.
(past simple passive, т.к. озеро было уменьшено, а не само оно ч.л. уменьшило)

REDUCE

B7

Paradoxically, man has reversed works of the Ice Age to the joy of hunters, sportsmen and naturalists, creating a lake from this once great bog.
(present perfect, т.к. действие не заканчивается. Человек изменил и продолжает менять …)

REVERSE

B8

Today the lake is 16 miles long with 70 miles of shoreline and is the largest body of water in the state.
(степень сравнения)

LARGE 

B9

The Pymatuning is a major nesting site for Canada geese and other migra-tory birds.
(goose – ед.ч. geese – мн.ч.)

GOOSE

B10

Hunters may use the controlled goose area only once each year. Hunters entering the area must register and be issued / are issued an identification badge.
(present simple passive, т.к. это правила, т.е. общие утверждения. Им надо зарегистрироваться, а не зарегистрировать кого-то )

ISSUE