31. They arrived at a farmhouse, in front of ___________sat a small boy.
| A．whom | B．where | C．which | D．That |
Will you take my previous experience into when you fix my salary?
| A．mind | B．thought | C．reference | D．account |
I would have come earlier, but I _____ that you were waiting for me.
| A．didn’t know | B．hadn’t know | C．would have known | D．haven’t known |
_______the thick clouds, you would find the kite in the sky easily.
| A．Had it not been for | B．If it were not |
| C．If it had not been for | D．Were it not for |
—What about the student in your class, Mr. Wang?
—The doctor said that sleep caused him poor memory and poor concentration.
| A．lacking of | B．lacked in | C．lacking | D．lack for |
To avoid on how to use the word, you’d better refer to a dictionary.
| A．to get confused | B．getting confused |
| C．to get confusing | D．getting confusing |