Teachers have to constantly update their knowledge in order to maintain their professional ________．
A.consequence B.independence
C.competence D.intelligence
It was never clear ________ the man hadn't reported the accident sooner.
A.that B.how C.when D.why
In that school, English is compulsory for all students, but French and Russian are _______.
A.special B.regional C.optional D.original
Between the two parts of the concert is an interval, ________ the audience can buy icecream.
A.when B.where
C.that D.which
—Tommy is planning to buy a car.
— I know. By next month, he ____ enough for a used one.
A.saves B.saved C.will save D.will have saved
The fact that so many people still smoke in public places____ that we may need a nationwide campaign to raise awareness of the risks of smoking.
A.suggest B.suggests C.suggested D.suggesting
