英文选择要求还要帮忙解释清楚.IknowJonathanquitewellandneverdoubthecandoagoodjobofit.A.whetherB.thatC.whenD.whatHowmanymoredecadeswillhavetopassscientistssucceedinprovidingacureforcancer?A.when

Question

英文选择要求还要帮忙解释清楚.
I know Jonathan quite well and never doubt_____ he can do a good job of it.
A.whether B.that C.when D.what
How many more decades will have to pass_____scientists succeed in providing a cure for cancer?
A.when B.before C.since D.until

Answer 1

1 B doubt 只能和that连用 表示怀疑
2 B 翻译过来是还要几十年科学家才能成功的研发出对癌症的治疗办法
所以应该是在他们研制成功之前还要多少年 所以选B
当然until 也有这个意思 可是通常 是not until 连用