—The spacecraft has never been to the moon, ________ ?
—Certainly.

—The spacecraft has never been to the moon, ________ ?

—Certainly.

A．has it             B．hasn’t it          C．doesn’t it        D．isn’t it

The spacecraft ____ an altitude of 343 kilometres.

1. A.
   reached
2. B.
   got
3. C.
   arrived
4. D.
   got in

—The spacecraft has never been to the moon, ________ ?
—Certainly.

1. A.
   has it
2. B.
   hasn’t it
3. C.
   doesn’t it
4. D.
   isn’t it