— We would appreciate it if you could stay for lunch.— Sorry, I         . I have another appointment.  
#87659
A
won’t
B
shan’t
C
can’t
D
mustn’t
推荐题目
I _____ you somewhere before , but your name has escaped me _____ moment . 
#90395
A
must see ; for a moment
B
must have seen ; for a moment
C
must see ; for the moment
D
must have seen ; for the moment
—Is the letter from your mother?—Yes. But she ________ the letter herself, because she doesn't even know one word.
#86535
A
needn't have written
B
can't have written
C
might not have written
D
should not have written