—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 |
—Where is my dictionary? I remember I put it here yesterday.
—You________ it in the wrong place.
| A．must put | B．should have put | C．might put | D．must have put |
Eugene's never willing to alter any of his opinions. It’s no use _____ with him.
| A．to argue | B．arguing | C．argued | D．having arg ued |
．We had wanted to finish our task by noon, but it didn’t quite________.
| A．find out | B．give out | C．hand out | D．work out |
__________ __ you may be right , I can’t agree completely.
| A．While | B．As | C．If | D．Since |
The time he has devoted in the past years _______ the disable is now considered ________ of great value.
| A．to help; being | B．to helping; to be |
C．t o help; to be |
D．helping; being |