The 30th Olympic Games started ____ July 27th, 2012 in London.
A．at B．on C．in D．by
Daisy wants to be ____ engineer while Jack wants to be ___ teacher.
A．an; the B．the; the C．an; a D．the; a
_____ to the party, Joan was greatly hurt.
A．Having not been invited. B．Having not invited
C．Not having been invited D．Not having invited
________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
