有时候，宠物可以帮人做点家务。
Sometimes a pet can ________ some housework.
你最好给我留下你的电子邮箱。
You _______ leave me your e-mail address.
他花很多时间玩电脑游戏，视力都下降了，不得不戴上了眼镜。
He______________his eyesight became poor and he had to wear a pair of glasses.
送到青海玉树的不仅有衣服还有帐篷。
____________________have been given to the people in Yushu, Qinghai.
你愿意把自己的座位让给这位老人吗？谢谢！
____________________ to this old man? Thank you!
我非常高兴地铁15号线顺义段正在建设中。
_____________the Subway Line 15 in shunyi ____________.
