现学现用
1. I study for a test_____ working with a group.
A. with B. by C. in
2. When the bell rings, the students quickly go into the classroom one_____ one.
A. at B. to C. by
3. All the work must be finished _____ five o’clock in the afternoon.
A. by B. in C. on
4. I think one of the most efficient means of transportation is plane. And it was_______ by the Wright brothers in 1903.
A. invented B. created C. discovered
