Although he was in poor health, Robert succeeded ______  other more famous engineers failed. 
#74635
A
which
B
that
C
what
D
where
推荐题目
     the sentence , so he asked the teacher to explain it again.
#67881
A
Not having understood
B
As he didn’t understand
C
Having not understood
D
He didn’t understand
I don’t know ______ he will come tomorrow. ______ he comes , I’ll tell you.
#41016
A
if ; Whether
B
whether; Whether
C
if ; That
D
if ; If