16、不定项选择题 Read the following text. Choose the best word（s） for each numbered blank and mark A, B, C or D on the ANSWER SHEET. （10 points）

　　There’s nothing more welcoming than opening a door for you. （1） _____ the need to be touched to open or close, automatic doors are essential in （2） _____ disabled access to buildings and helping provide general （3） _____ to commercial buildings.
　　Self-sliding doors began to emerge as a commercial product in 1960 after being invented six years （4） _____ by two Americans Dee Horton and Lew Hewitt. They （5） _____ as a novelty feature, but as their use has grown, their （6） _____ have extended within our technologically advanced world. Particularly （7） _____ in busy locations and during times of emergency, the doors （8） _____ crowd management by reducing the obstacles put in people’s way.
　　（9） _____ making access both in and out buildings easier for people, the difference in the way many of these doors open helps to reduce the total area （10） _____ by them. Automatic doors often open to the side, with the panels sliding across one another Replacing swing doors, these （11） _____ smaller buildings to maximise the usable space inside without having to （12） _____ the way for a large, sticking-out door. There are many different types of automatic door, with each （13） _____ specific signals to tell them when to open. （14） _____ these methods differ, the main （15） _____ remain the same.
　　Each automatic door system （16） _____ the light, sound weight or movement in their vicinity as a signal. Sensor-types are chosen to （17） _____ the different environments they are needed in. （18） _____ a busy road might not （19） _____ a motion-sensored door, as it would constantly be opening for passers-by. A pressure-sensitive mat would be more （20） _____ to limit the surveyed area.

A A．As well as

B B．In terms of

C C．Thanks to

D D．Rather than