I want ______ some bird-watching this weekend.

When the school building began to shake,the teachers ran downstairs _____ all the students. The teachers are real heroes. [ ]

We are looking forward to ____ my grandparents soon.

I rang the bell for a long time last night, but no one opened the door.— Oh, the family __________ a party and they didn’t hear the bell.

Someone is knocking at the door. Is it your brother?—No, it be him. He’s gone to Hunan.