As ______ unemployment is very high at the moment, it's very difficult for people to find
A. the; /
B. /; /
C. the; a
D. an; the
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Everybody learns his mother language ______.
A. at the age of six
B. when he is a small child
C. after he goes to school
【B10】
A. in
B. after
C. about
【B3】
A. useful
B. second
C. spare
Lots of animals were
A. very dirty
B. very weak
C. very active