Are your __________ workers (工人)—No, .

don’t try your best to learn all subjects, youwill ___ behind

ennisgettingalongwithhiswork —-Well,hecanalways________anewideaforincreasingsales.

_______ is known to us is that time is limited and precious.

Jack failed the driving test again． —The question is_____ we can help him avoid making the same mistake．