按要求完成下列各题。(20分)
(1)These are tiger_cubs.(就画线部分提问)
________ are these?
(2)They are lion cubs.(改为一般疑问句)
________ ________ lion cubs?
(3)The bear can ride a bike.(改为否定句)
The bear ________ ride a bike.
(4)Are those lions? (作肯定回答)
________,________ ________.
(5)What is this? (改为复数句)
What ________ ________?