All_________ is useful to us is good.
A: which
B: what
C: that
D: whether
A: which
B: what
C: that
D: whether
举一反三
- I heard （）running is good for the health A: that B: what C: whether D: which
- Whether a good is a luxury or necessity depends on the A: price of the good. B: preferences of the buyer. C: intrinsic properties of the good. D: scarcity of the good.
- She ddi all ___ she could to help tthem. A: what B: that C: which D: whether
- ________ is known to us all is that the 2012 Olympic Games will be held in London. A: It B: What C: As D: Which
- Our teachers always give us good advice. We should follow ________. A: what they say B: what they said C: which they say D: which they said