—What do you think of the 3-D printer?—It’s great although it still needs further       .

What’s your favourate ___________?’  ‘Football.’

 We can never pay you back for your __________, your ___________ and gift of knowledge.

 Parents shouldn’t do all the things for their children because too much ______ prevents children’s development. 

---- Could you please tell me something about the two _________?---- _____. They are exchange students of No. 1 Middle School.