Professor Smith will come here to give a speech. All the preparations must be _____ before 5 o’clock.
Look over there – there’s a very long, winding path ______ up to the house.
It’s no use ______ without taking action.
Sarah pretended to be cheerful, ______ nothing about the argument.
The lecture, ______ at 7:00 pm last night, was followed by an observation of the moon with telescopes.
Marco Polo is said to have sailed on ______ Pacific Ocean on his way to Java in ______ thirteenth century.