These diagrams are especially helpful when we have a concrete problem ______ at hand.
)You can give the document to _______is in the office.However, _______to require a written paper for it.
)Can it be in the restaurant_______ we had dinner last Sunday _______you left your wallet?
—Did Jack come back early last night? —Yes,it was not yet eight o’clock_______he arrived home.
—Oh,Tom!You are too late. —Sorry.How I wish I ______ measures Mr Smith suggested to leave ten minutes earlier.
—Flight 331______.I’d better be on my way.Goodbye. —Bye.Happy landing!