—How long does Kitty spend on her homework?—________.
#51621
A
Half an hour
B
A half hour
C
Half hours
D
An half hour
推荐题目
We know that 80          of the cases of blindness can          .
#51508
A
per cents; cure
B
percent; cured
C
per cent; be cured
D
percent; are cured
Anna is already ______ girl, but she is lazy. She wants to get her clothes ______ again. 
#51459
A
a 17-year-old, to wash
B
a 19-year-old, washes
C
an 18-year-old, washed
D
an 8-year-old, washing
      of the teachers in our school       women.
#51639
A
Two thirds, are
B
Two threes , is
C
Two third, are
D
Two thirds , is
 ---Jackie Chan donated _______ dollars to charity.. ---He is an example to us all.
#51721
A
thousand
B
thousands
C
thousand of
D
thousands of