Daniel and I in Class 1, Grade 7. are classmates.

By the time I got home, Gina and her sister ______ their project already.

You can talk with anyone ______you think is friendly. [ ]

There are some police cars in front. What do you suppose ____?

一Are you going to Guilin by plane?一It’s fast but expensive, so I’m not sure．I ________ take a train．