Aluminium looks heavy but actually ________ very light.
A. it is
B. they are
C. he is
D. she is
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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?
I find ____________ to make some changes.
A. it is quite necessary
B. that is quite necessary
C. it quite necessary
D. quite necessary
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