Tom was caught cheating in an important exam. _____, he lost a golden chance of taking part in this competition.
Shopping online can save much time as you _______ go to a shop or walk around crowded shopping centers.
___ there are living creatures in the outer space as those on Earth hasn’t been proved until now.
With so many orphans _______, the charity organization calls for more donations.
Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and experts can’t be exactly sure about its use.
Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent fewer calories than usual increased life span.