The doctors must get there in half an hour. There should be no____ in sending the blood to the dying girl .
A. delay B. wait C. time D.hurry
.Among all the problems,_______is so difficult as this one.
A.not one B.either C.neither D.none
It was 1920 ______ regular radio broadcasts began.
A.while B.when C.that D.since
_____ is reported in the newspaper that talks between the two countries are making progress.
A. Which B. As C. That D. It
Have you any knives？ I need a sharp ________.
A.it B. another C. one D.any
Lucy has a great sense of humour and always keeps her colleagues with her stories.
A. amused B. amusing C. to amuse D. to be amused
