Question

语法填空

　　In the sea, at the base of what scientists call the food web, 　　1　　 single-celled plants．　　2　　 plants–algae(海藻)–provide the energy for the web that feeds higher forms of life．

　　　　3　　 some conditions, algae suddenly begin to spread very quickly, an event 　　4　　(know)as a bloom．When algae bloom, they can change the color of the water as they form dense areas near the surface．You may 　　5　　(hear)the term“red tide”．But experts say this is 　　6　　(correct)．Blooms are not connected with tides, and 　　7　　do not always appear red–the water can look brown 　　8　　 greenish．So, instead of“red tide”, scientists use the term“harmful algal bloom”, or HAB 　　9　　 short．Not only the fish that feed on algae are dangerous to eat, bigger fish that eat the algae-eaters may also be 　　10　　(danger)．

Answer 1

答案：
解析：

1．are　2．These　3．Under　4．known　5．have heard　6．incorrect　7．they　8．or　9．for　10．also

提示：

1、倒装句　2、指示代词　3、介词(短语)　4、非谓语动词(过去分词)　5、完成时　6、构词法(反义词)　7、代词　8、并列连词　9、介词　10、名词－形容词。