_____ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
None would have dreamed of there _____ such a beautiful place.
—You seem to have had that car for years. ---Yes, I should sell it ____ it still runs.
- Excuse me, is this Mr. Brown’s office? --- I’m sorry, but Mr. Brown ____ works here. He left about three weeks ago.
Early ____ the morning of May 1, we started of _____ the mountain village.
He has been caught ____ the rain and is wet ___ the skin.