A. what he was doing that B. that what he was doing that
C. what he was doing D. that what his doing that
22._______ of the earth _____ covered by water.
A. Two third, are B. Two thirds, are C. Two three, is D. Two thirds, is
23. As with hiking, children can ___________.
A. get close to the nature B. get close to nature
C. get closely to nature D. get closely to a nature
