Topics: Present Perfect: for/since
They ____ (use) this laptop ____ spring.
A. have used/ since
B. has used/ since
C. have use/ for
D. have using/ for
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Karen ____ (not/be) near the sea ____ a long time.
A. haven`t be/ for
B. hasn`t been/ since
C. haven`t been/ since
D. hasn`t been/ for