____, he does not know the answer.
I will put the book________you placed it and make a mark at the place________I put it.
________ you may have,you should gather your courage to face the challenge.
—Haven’t seen Lucy recently,what’s happened?—Oh,it’s more than two months ________ she worked here.
________you’ve experienced it,you can’t understand how I felt.
I had no idea of the exact address of Xinhua High School ________I was outside its front gate.