D. The
48. Jim is optimistic. He lives a wonderful life.
A. If Jim wasn't optimistic, he would not live a wonderful life.
B. If Jim hadn't been optimistic, he would not have lived a wonderful life.
C. If Jim weren't optimistic, he would not live a wonderful life.
D. If Jim isn't optimistic, he will not live a wonderful life.
49. Because of the serious accident, the road was blocked.
A. Because the accident is serious, the road was blocked.
B. Due to the accident was serious, the road was blocked.
C. Though the accident was serious, the road was blocked.
D. Because the accident was serious, the road was blocked.
50. People think that the city will become greener in 2030.
A. It was thought that the city will become greener in 2030.
B. The city is thought to become greener in 2030.
C. The city is thought to have become greener in 2030.
D. The city was thought to become greener in 2030.