虚拟语气(Ⅰ)
观察上面的对话, 并类比填空。
1. If you were(be) an artist, what kind of pictures would you paint?
2. If the rules of perspective had not been discovered(not discover), no one would have been able to paint such realistic pictures.
3. Without the new paints and the new technique, we would not be(not be) able to see the many great masterpieces for which this period is famous.
