Grammar for IELTS with answers, Hopkins D., Cullen P., 2007

Grammar for IELTS with answers, Hopkins D., Cullen P., 2007.

   Do you want to be confident that you have covered all the grammar you will need for the IELTS test? Would you like to improve your listening skills at the same time? Cambridge Grammar for IELTS provides comprehensive coverage of the grammar needed for the test and gives you the chance to hear grammar being used in different situations, as well as offering plenty of test practice.

Grammar for IELTS with answers, Hopkins D., Cullen P., 2007


Jumping spiders.
For a stalking predator, the element of surprise is crucial. And for jumping spiders that sneak onto other spiders' webs to prey on their owners, it can be the difference between having lunch ana becoming it. Now zoologists have discovered the secret of these spiders' tactics: creeping forward when their prey's web is vibrating.

The fifteen known species of Portia jumping spiders are relatively small, with adults being about two centimetres long (that's smaller than the cap on most pens). They habitually stay in the webs of other spiders, and in an area of these webs that is as out-of-the-way as possible. Portia spiders live mostly m tropical forests, where the climate is hot and humid. They hunt a range of other spiders, some of which could easily turn the tables on them. 'They will attack something about twice their own size if they are really hungry,' says Stimson Wilcox of Binghamton University in New York State. Wilcox and his colleague, Kristen Gentile of the University of Canterbury in Christchurch, New Zealand, wanted to find out how Portia spiders keep the upper hand.



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