问题

Is it the fact ____ he hasn’t turned in his research report?[ ]
A: whether
B: that
C: which
D: why
B: that
C: which
D: why
正确答案是:
同类题型
The children were warned of not being too _______ about things you are not supposed to know.
My old neighbour Charles felt__________ after hischildren moved out.
She felt completely ______ during the vacation but now she has to go back to work again
______ is your grandpa, Emma —He’s watering the flowers in the garden.