Only ________ according to the directions can the medicine be quite effective.
A．taking B．taken
C．being taken D．having been taken
—We didn't find the Blacks ________ the lecture.
—No one had told him about ________ a lecture the following day.
A．to attend；there to be B．attending；there being
C．attended；there be D．attend；there was
A few days after the interview，I recevied a letter ________ me admission to the university.
A．offering B．offered
C．having offered D．to be offered
—Why do you look sad?
—There are so many problems ________.
A．remaining to settle B．remained settling
C．remaining to be settled D．remained to be settled
________ as the “first lady of speech”，Dr, Lillian Glass is recognized as one of the world's leading experts on communication skills.
A．Knowing B．Having known
C．Known D．To be known
John received an invitation to dinner，and with his work ________，he gladly accepted it.
A．finished B．finishing
C．having finished D．was finished
