48. He asked, 'Why didn't she take the final exam?’
A. He asked why she hadn't taken the final exam.
B. He asked why she took the final exam.
C. He asked why she was taking the final exam.
D. He asked why she doesn't take the final exam.
49. We must take steps to save natural resources, otherwise the planet will be in danger.
A. If we take steps to save natural resources, the planet will be in danger.
B. If we take steps to save natural resources, the planet will not be in danger.
C.If we take steps to save natural resources, the planet would be in danger.
D. If we take steps to save natural resources, the planet will be in danger.
50. We won't go on holiday this year because we don't have enough money.
A. If we don't have enough money, we will not go on holiday this year.
B. If we had enough money, we would go on holiday this year.
C.If we had enough money, we would have gone on holiday last year.
D.If we have a lot of money, we would go on holiday.