X. Choose the correct option to complete the sentence

1. For efficient and safe operations of the aircraft engine, continuous monitoring _____.

a) requires b) is required c) required d) were required

2. This system _____ by over one thousand airliners and airplanes such as the B727, B737.

a) is used b) is using c) uses d) has used

3. In a broader sense, the term “avionics” _____ the hundreds of systems that are fitted to an aircraft to perform specific individual functions.

a) included b) is included c) including d) includes

4. These additional devices and systems can be _____ a search light for a police helicopter.

a) as simple b) simple c) simpler as d) as simple as

5. Richardson Electronics stocks _____ selection of commercial replacement weather radar magnetrons in the world.

a) wide b) wider than c) the widest d) so wide as

6. These magnetrons _____ be used in airborne, weather, ground or military radar applications.

a) may b) has to c) can d) need

7. _____ there are many advantages to a wireless avionics implementation; there are also many challenges.

a) Though b) Moreover c) But d) However

8. This _____ new short-range communication technologies like Bluetooth and the Wireless Local Area Network (WLAN).

a) resulted to b) has resulted in c) result from d) was a result

9. The proposed system imitates the flight management system of any commercial aircraft _____ of functionality.

a) at the turn b) as the term c) like a team d) in terms

10. As more people begin to use planes as their primary method of transportation, more elaborate methods of controlling aircraft safely in these high restrictive airspaces _____.

a) have been invented b) was invented c) are inventing d) invented