t believe that anyone else in theschool can swim as fast as you, ________

Manyexperts believe that teachers’ development is _______ the key to bettereducation lies.

__________is your father-He’s an engineer in a big factory.

Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.

News of the robberies _____ many people _____ fitting new locks to their doors. [ ]