Eal of detailed research is being performed in this area

?Did you _do_____the safety test?

?Have they __build____ the prototype yet?

?I’d like to _test_____ your theory.

?We still haven’t ___found_____ a good solution.

?I’ve _solved_____ the problem with the machine.

?Do you think we’ll __meet _______ the deadline?

?First, typical or preliminary model of something, especially a machine, from which other forms are developed or copied.-prototype

?a sudden and violent shaking of the ground, sometimes causing great destruction-earthquakes

?Find the synonym for “collide”- crash

?There was a terrible____collision______ between the two football players.

?Can we make some___modification__________ to the designs?

?The___Aviation __________ industry needs to reduce pollution from its engines.