There are many websites，________you can find almost all the necessary information.

The field research will take Joan and Paul about five months; it will be a long time __________ we meet them again.

Americans eat ______ vegetables each person today as they did 20 years ago.

Would it be ____for you to pick me up at four o’clock and take me to the airport?

I’m worried about tomorrow’s math exam.— ______ . I’m sure you will make it.