完形填空. As we all know, human beings have five senses. 1. have you ever heard that

完形填空。      As we all know, human beings have five senses.  1.________    have you ever heard that
instead of having five senses like humans, plants have just one or two senses?
     Some plants can sense sunlight and grow towards it. Plants   2.________   feed on small
insects can sense the soft touches of the insects on their leaves.   3.________  they sense the
insects, they move their leaves all of a sudden to catch them. Scientists have found that plants
can feel  4.________    the animals around them want to hurt them or not.   5.________   is
even more amazing are the results of  6.________   recent experiment carried out by some
Italian and German biologists. According to their report, when some plants sense dangerous
insects, they give  7.________   a kind of smell to pass the information on to   8.________  
plants. The smell also attracts other insects which will kill the dangerous ones. In this way, the
plant can avoid being eaten.

试题答案

1．But   2．that/which    3．After/When/Once.4．whether 
 5．What  6．a     7．offgive off   8．other