1 . If he had not skipped breakfast so frequently, he ______ with stomachache now.

A．would not end up	B．would not have ended up
C．will not have ended up	D．will not end up

2 . ________ water, the world ________ ________ a terrible place .
要是没有水，世界将是一片糟糕。

3 . If I were given another chance, I ________ much better than I did last night.

A．will perform

B．performed

C．was performed

D．would perform

4 . I don't have enough money, so I can't buy a nice car.（变成虚拟语气句子）
________ I________ enough money，I________ ________a nice car.