People try to avoid public transportation delays by using their own cars, and this ____ creates further problems.
Teachers have to constantly update their knowledge in order to maintain their professional ___.
It was never clearthe man hadn't reported the accident sooner.
In that school, English is compulsory for all students, but French and Russian are___
Between the two parts of the concert is an interval, ___the audience can buy ice-cream.
——Tommy is plannning to buy a car.——I know. By next month, he ___enough for a used one.