—How can we protect ourselves ________ the earthquake?  —We should stay calm first.

I go to school by _______, but my best friend goes there ______foot. 

She not only sings , she plays the piano         .

－Who’s that young man on the poster?－Justin Bieber,           excellent singer.

My daughter is much ______ now. The trousers she wore last year are already too short for her.