25 questions / Pres. Perf. Simple Pres. Perf. + "For" or "Since" Yet, Already, Still, Just Pres. Perf. Cont. Pres. Perf./Pres. Perf. Cont.
25 questions / Pres. Perf. Pres. Perf. + "For" or "Since" Pres. Perf./Past Simple Pres. Perf. Cont. Pres. Perf./Pres. Perf. Cont.