_to my regret, I am unable to accept your warm invitation. 
#24804
A
Very
B
Much
C
Great
D
A lot
推荐题目
Henry was away from home for quite a bit and _______ saw his family.
#22087
A
frequently
B
seldom
C
always
D
usually
 Strong sandstorms are often _____ you cannot see the sun.
#24303
A
so thick that
B
such thick that
C
thick in order that
D
thick such that