Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and experts can’t be exactly sure about its use.
He must have ________ the funny story. I can’t believe that it’s true.
Alien had to call a taxi because the box was _____ to carry all the way home.
I was really anxious about you. You _______ home without a word.
The number of people invited ___fifty, but a number of them____ absent fordifferent reasons.
They were arguing _____each other _____ the cause of SARS.