Topics: Present Perfect: for/since
We ____ (not/visit) grandma ____ last winter.
A. has not visit/ for
B. have not visit/since
C. hasn`t visited/ for
D. haven`t visited/ since
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They ____ (use) this laptop ____ spring.
A. have used/ since
B. has used/ since
C. have use/ for
D. have using/ for