Gap Filling: The following passage is taken from the textbook. Fill in the numbered gaps with the correct form of the words or phrases in the box (there are more words than necessary).

discover / join / participate / which / cross / communicate / where /shrug / more than/ challenge/  train / strike/ means  

     When we think of communication, we normally think of using words—talking face to face, writing messages and so on. But in fact, we_____________ far more in other ways. Our eyes and facial expressions usually tell the truth even when our words do not.
     Then there are gestures, often unconscious: raising the eyebrows, rubbing the nose, _____________ the shoulders, tapping the fingers, nodding and shaking the head. There is also the even more subtle “body language” of posture. Are you sitting—or standing—with arms or legs _____________? Is that person standing with hands in pockets, held in front of the body or hidden behind? Even the way we dress and colours we wear communicate things to others.
     So, do animals communicate? Not in words, although a parrot might be _____________ to repeat words and phrases which it doesn’t understand. But, as we have learnt, there is more to communication than words.
     Take dogs for example. They bare their teeth to warn, wag their tails to welcome and stand firm, with hair erect to challenge. These signal are surely canine equivalent of the human body language of facial expression, gesture and posture.
     Colour can be an important _____________ of communication for animals. Many birds and fish change colours, for example, to attract partners during the mating season. And mating itself is commonly preceded by a special dance in which both partners _____________.
     Here again, there are _____________ similarities to youngsters who dress up to meet partners at discotheques, _____________ the music is often too loud for verbal communication. Communication there takes place through appearance and movements.
     The most elaborate dances in the animal kingdom are those which bees use to communicate. With body movements alone they can tell other bees the direction and distance of a newly _____________ food source.
     All these examples may suggest instinctive rather than intelligent communication. But human body language is largely instinctive, too. And, in many ways, body language says far _____________ intelligent, verbal communication ever can.