当x=3，y=1时，代数式（x+y）·（x-y）+y²的值是（    ）。

根据汉语或所给词的正确形式填空。

小题1:He usually takes a ____________ (淋浴) after he gets up.

小题2:Are there any ____________ (警察) in the street?

小题3:Koalas sleep ____________ (在……期间) the day and get up at night.

小题4:Don’t be_____________ (懒惰的) ! You must work hard.

小题5:Mr. Green is a good teacher. He ____________ (教) us music.

小题6:Does Molly enjoy____________ (read) magazines?

小题7:There_____________ (be) some fruit on the table.

小题8:It’s 5:30 now. The children_____________ (clean) the classroom.

小题9:Our teacher is very_____________ (friend) to us. We all love her.

小题10:This kind of animals likes to eat____________ (leaf).