问题
They asked _____ to improve the soil.[ ]
A: that it was hard
B: whether it was hard
C: if it is hard
D: when was it hard
B: whether it was hard
C: if it is hard
D: when was it hard
正确答案是：
同类题型
The chairman asked me to ______my speech to 20 minutes.
_____ that no effort can be spared to deal with it, or it will be too late.
There _______ a football match next week. Shall we go and watch it
The stamps, once ________, will be very popular with stampcollectors [ ]
So touching ______ that I couldn’t hold my tears back when I heard it for the first time.