Don’t try to cheat the taxman (税务人员); you’ll never ________it.
Wash your hands with soap and water ___ after each contact with the sick person.
After the fun he has had during the holidays, the boy can’t ___ on his schoolwork.
Jim went to answer the phone. ___, Harry started to prepare lunch.
Clinical evidence began to ___, suggesting that the new drugs had as wider range of useful activities than had been predicted from experiments in animals.
He had his camera ready ___ he saw something that would make a good picture.