Aluminium looks heavy but actually ________ very light.
A. it is
B. they are
C. he is
D. she is
Poor little baby! What __________ crying for?
A. are they
B. is it
C. is she
D. is he
Hello, who ____________ speaking?
A. is it
B. are you
C. is he
D. is she
A: Someone is at the door.B: __________?
A. What is it?
B. Who is it?
C. Who is he?
D. Which one is it?