—When did your cousin begin to show his interest in medicine?—It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab. 

____ is certain, though, is that the mystery of Tutankhamun’s tomb has never been fully explained.

“___________ the election is over,” said Powell, “the time has come for me to step down as secretary of state and return to private life.”

A week-long raining is coming, _________, the farmers say, will do harm to the growth of plants.

All the books I have are here. You may borrow           you like.