Listen! Is Kitty in the next room? —- No, it ______ be Kitty. She has gone to Beijing.

While Mary ___ a letter, the children were playing outside.

I spent five yuan on this pen. =” I” spent five yuan buying this pen.

The bus hit against a tree in the fog and __________to the deep valley, with ten passengers killed and twenty wounded.

Why don’t you choose the red tie? –For me, it doesn’t _________ my shirt very well.