Unit Test 9A Key
1 1 find / 2 meet / 3 do / 4 build / 5 solve / 6 made / 7 do
2
Production
Problems in Space
mass-produce
flight test
modification
aviation
simulation
prototype
asteroid
meteor
impact
collision
meteorite
deflect
3 1c / 2c / 3d / 4a / 5c / 6a / 7b / 8d / 9c / 10b / 11a / 12a
4 1 0 / 2 the / 3 the / 4 an / 5 an / 6 the
5 1c / 2d / 3e / 4b
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