Прочитайте текст. Заполните пропуски в предложениях под номерами В12-В18 соответствующими формами слов, напечатанных заглавными буквами справа от каждого предложения. TEST 02  (part 2)

B12

Before the ……………… of the hot air balloon, no human had ever successfully flown above the ground.

INVENT

B13

Two ……………… brothers, Josef and Etienne Montgolfier, were responsible for designing the world's first hot air balloon.

FRANCE

B14

The first successful ……………… was in 1783, and the Montgolfier

FLY

B15

brothers immediately became ……………… throughout the world.

FAME

B16

The design of hot air balloons is based on the ……………… law that hot air rises. Aburner at the bottom of the balloon

SCIENCE

B17

provides the ……………… . As the air inside the balloon gets hotter, the balloon takes off.

HOT

B18

Its height above the ground is determined by how hot the air  inside is and its ……………… of travel depends on the wind.

DIRECT