2 Complete each pair of sentences a and b with the same word.
1 a At ____________ over three billion people in the world live on less than $2.50 a day.
b Every year, Canada receives 20,000 tulip bulbs from The Netherlands as a ____________ .
2 a Nowadays, more and more people are moving from the city into the ____________ because they want a slower pace of life.
b The biggest ____________ in the world by area is Russia.
3 a The ____________ most spoken language in the world is English with over 500 million speakers. It comes after Mandarin with over one billion speakers.
b The longest word in English has 189,819 letters and takes 3 hours, 33 minutes and 23 ____________s to pronounce.
4 a The easiest ____________ to calculate population growth is using a mathematical equation.
b While we were travelling around the country, we lost our ____________ several times. Next time, we need to bring a map