--- What ________ useful book ! ---Yes, it is. But I found___________ difficult for me to read.
#53097
A
an, it was  
B
a, it’s   
C
an, it’s
D
a, it
推荐题目
I want to do    this time . 
#53484
A
something different
B
different something
C
anything different
D
different anything .
The black bag isn’t_______. It’s________.
#54305
A
mine; your
B
her; mine
C
his; me
D
mine; his
—Mum, I am thirsty. Where is______ cup?—Is this______?—Yes, thank you.
#54297
A
mine; yours
B
my; your
C
mine; your
D
my; yours