．The fact has worried many scientists ______ the earth is becoming warmer and warmer these years

Hi, BillI _____ you _____ in this cityHow long have been here?

Do you know who _______ help if you feel stressed

―Are you_______the school art club ―No . _______I want to join it this year .

In order to ________ consumers，it’s extremely important to consider what informationshould be included in the advertisement.