---Is he here now?---No, I ___ he ___ here by now.
| A．thought, was | B．think, will be | C．think, is | D．thought, had been |
________we went to visit Professor Smith, he________his research work.
| A．The first time; devoted to | B．Whenever; was concentrate on |
| C．For the first time; was busy with | D．Each time; was absorbed in |
A true gentleman is always _______ with himself and tolerant with others.
| A．strict | B．cautious | C．enthusiastic | D．positive |
—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 |
____________ many times, but he still couldn’t understand it.
| A．Though he had been told | B．Having been told |
| C．Having told | D．He had been told |
It was in the lab_________was taken charge of by Johnson_________they did the experiment.
| A．where; which | B．which; that | C．which; which | D．that; which |