Excuse me, where I put my clothes? The wardrobe is full.

He kept on _______ the mountains all by _______ for three days.

Is this book familiar ______ you? — SureI am also familiar ______ its writer

(2009江苏南通调研) I forget where I read the article, or I _____ it to you now.

The window is dirty.—-I knowIt ______ for weeks