问题
A survey of health researchers ______ that four hours of exercise every week ____ good for our health.
A:show are
B:shows is
C:show is
D:shows are
B:shows is
C:show is
D:shows are
正确答案是：
同类题型
Following Christianity, witnesses have to _______ on the Bible to tell the truth.
Fred is second to none in math in our class，but ______，he hardly passed the final math exam.
Mike _____ have stolen the money from the bank, _____ he appeared to be rich overnight. [ ]