We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.
A.when; which | B.which; when | C.what; that | D.on which; when |
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We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.
A.when; which | B.which; when | C.what; that | D.on which; when |