It is bad manners to ________an invitation without a reason.
#99896
A
break down
B
settle down
C
turn down
D
calm down
推荐题目
 Don’t interrupt me. I ________ letters all morning and have only finished five.
#102275
A
write
B
have written
C
have been writing
D
am writing
      ---____ the paper ?--- No, I have still got one page to finish.
#103668
A
Have you done
B
Do you do
C
Did you do
D
Had you done
Someone     my umbrella. It’s wet and it was wet in the last few days.
#100419
A
was using
B
must have used
C
has been using
D
has used