Millions of people felt ______ amazed at the news that Steven Hawking joined Sina Weibo.

How often do I need to feed the dog— It ________ food every day, or it will be hungry.

Don’t forget to turn off all the lights before you leave.— ___________________.

t that Ann’s husband over there — No, it ________ be him — I’m sure he doesn’t wearglasses.

My father’s mother is my .