____ is certain, though, is that “the curse of the mummy” remains a riddle to this day.
A scientific report has found that snow and ice on Africa’s highest mountain Kilimanjaro ______rapidly and could vanish within 20 years.
–Frank failed the driving test again. --______ He practiced a lot and was quite confident.
______________ that my dearest friend would play a trick on me in front of all my students.
More and more Chinese people follow the practice ______ they will travel to various scenic spots to enjoy the scenery in their leisure time.
Do you know ______________ had reported the accident to the police?