Everybody has android phone nowadays. And everybody knows how to operate it, especially teenagers. It is rapidly used for everything these days. It helps us to run our business. It helps us to access any public transportation easily. It also helps teacher to conduct test for their students. It’s called Android Based Test. Why android? Why not paper based test? Android saves so much expense, and of course, electricity. Teachers don’t need to do any printing work here. No printing means no electricity requires too. This is a go green thing. Secondly, android based test if compared to paper-based test is more effective when it comes to prevent students from copying answers from friends, as teachers can randomize the questions, and the options if it is multiple choice. Thirdly, teachers do not need to do their long boring correction work on the students’ answers. Android can do that instantly. So, they can know the test result quickly. Why android? Why not computer-based test? Not every student has laptops at home. And school can’t provide PC or laptop for every student. PC also needs much electricity. This will insure more cost. Innovation swiftly comes and goes. It always comes with pros can contras. It also comes with benefits and disadvantages in one package. It’s all about which point of view we use.

Find the word in the text that has similar meaning with the word at once!