________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
_______ cleaning the yard and making up the beds for the old, we also read newspapers for them and had chats with them.
A．Except for B．Rather than C．Apart from D．Instead of
