If you find yourself ______ no one will help you, please call me.
| A．where | B．when | C．which | D．what |
_______ on the American Civil War, the book attracted a large number of readers when it was published.
| A．Based | B．Basing |
| C．Having based | D．Being based |
I haven’t seen Li Lei these days. He was said _____ to the hospital to receive treatment.
| A．to take | B．to have taken |
| C．to be taken | D．to have been taken |
—Do you mind my closing the door? It’s a little bit cold in here.
—___________.
| A．Go ahead | B．Yes, you do | C．Hold on | D．Come on |
Lucy couldn’t remember when she met Tom, but she was sure it was on ______Monday when she had ______ music class.
| A．/; the | B．the; / | C．a; a | D．/; a |
I ______ an old letter while I was searching my drawer.
| A．came up | B．came across | C．came on | D．came about |