请用下列短语的适当形式补全句子。(28分)

（1）The elephants often ________．
（2）My mother always ________ and buys lots of clothes.
（3）Alex is a good boy and he always ________ and helps teachers.
（4）This cat is naughty and it sometimes ________．
（5）My father is healthy and he never ________．
（6）This summer is very hot and I often ________．
（7）My grandpa and grandma often ________ and watch TV.