David is such a good boy _______ all the teachers like. 
#70458
A
that
B
who
C
as
D
whom
推荐题目
 _______, her hands shook constantly and violently.
#70064
A
Knowing her son killed in the mine
B
When she knew her son was killed in the mine
C
Known her son killed in the mine
D
She knew her son killed in the mine