15. Where_______________ (she/be)? I _______________(wait) for her
16. _______________(they/know) that water _______________(boil) at 100 degrees Celsius?
17. My parents _______________ (build) the house in 1985.
15. Where_______________ (she/be)? I _______________(wait) for her
16. _______________(they/know) that water _______________(boil) at 100 degrees Celsius?
17. My parents _______________ (build) the house in 1985.
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