5. Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
A: which
B: that
C: what
D: whether
A: which
B: that
C: what
D: whether
举一反三
- Some researchers believe that there is no doubt ________ a care for AIDS will be found.
- There is some doubt he will come. A: that B: which C: whether D: if
- I doubt ____ we will pass the exam. A: whether B: that C: what D: which
- I don’’t doubt ______ he will come on time. A: whether B: which C: what D: that
- I am in doubt ______ I should buy it or not. A: if B: what C: whether D: which