B.) As
C.) Since
D.) Although
[单选题][A] Although [B] Because [C] If [D] While
[单选题]A. unlessB. sinceC. lestD. although
[单选题]A. providedB. sinceC. althoughD. supposing
[单选题]A.) unlessB.) whenC.) sinceD.) although
[单选题][A] Although[B] Unless[C] As[D] If
[单选题][A] what [B] since [C] as [D] that
[单选题]A. since B if C before D as
[单选题]A.) sinceB.) ifC.) beforeD.) as
[单选题]___________A.] when[B] since[C] for[D] whereas
[单选题][A] During[B] For[C] At[D] Since