Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors.
A.that | B.why | C.how | D.whether |
相关知识点
推荐套卷
Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors.
A.that | B.why | C.how | D.whether |