If ____ in, viruses can result in illness or even death.
— If you like, I can do some shopping for you.— That's a very kind_______.
— Your mother won’t like this dress, you know.— ________ I don’t care what she thinks.
The party last night was _______ success. We sang and danced until it came to _______ end at 12:00.
No decision about any future appointment until all the candidates(应试者) have been interviewed.
The accident on my way to school me taking the exam yesterday.