Some researchers believe that there is no doubt ________ a cure for AIDS will be found.(2005年广东省高考题)
A.which | B.that | C.what | D.whether |
推荐套卷
Some researchers believe that there is no doubt ________ a cure for AIDS will be found.(2005年广东省高考题)
A.which | B.that | C.what | D.whether |