34. There is some _____ how they can pay off so much debt.
A. question B. problem C. doubt D. wonder
33. The people all over the world should work hard ______ pollution.
A. for B. against C. with D. on
34. There is some _____ how they can pay off so much debt.
A. question B. problem C. doubt D. wonder
33. The people all over the world should work hard ______ pollution.
A. for B. against C. with D. on