The lecture, _______at 7:00 pm last night, was followed by an observation of the moon with telescopes.

Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and experts can’t be exactly sure about its use

The audience ______ when they heard the humorous story.

an electronic typewriter ,we can getevenly typed characters regardless of the pressure ________we strike the keys.

____our arriving at the airport , we were given a warm welcome by the local people.