It was not _____ she took off her dark glassed ___ I realized she was a wellknown actress.
He wondered ________ his son was getting along with the experiment.
In 1492 Columbus and his crew arrived ______ was so-called the New World by the westerners.
—It is _______he often fails in exams_______ makes his parents worried about him.—So, he has to work whole-heartedly.
In some countries, ______ is called “equality” does not really mean equal rights for all people.
The police were seeking more information to find out ______ the rich merchant.