(改为同义句) What is your favourite pet?

　　What pet do you __________ __________?

(改为一般疑问句) They sometimes eat vegetables．

__________ they __________ eat vegetables?

(对画线部分提问) We listened to a talk on the fantail goldfishndline．

__________ did you __________?

(改为否定句) You should take it out of the water．

　　You __________ take it out of the water．

(改为否定句) Fantail goldfish are very expensive．

　　Fantail goldfish __________ very expensive．

（用所给词的正确形式填空） The water in the tank must __________ (be) clean．

（用所给词的正确形式填空） Fantail goldfish are easy __________ (look) after．

（用所给词的正确形式填空） Fantail goldfish look like __________ (banana)．

（用所给词的正确形式填空） A fantail goldfish weighs about four __________ (kilogram)．

（用所给词的正确形式填空） You should __________ (put) your fantail goldfish in the sun．