--Can I get tickets for the conert? --___,Sold out
Jack had traveled six miles across the Channel _____his engine failed and was forced to land on the sea .
—When did he leave the classroom?—He left you turned back to write on the blackboard.
he thought he was helping us with the work, he was actually in the way.
Hearing his words ,I couldn’t decide or remain .
Questions and exercises are given by the computer, which decides ______ to move the students ahead, review an easier level, ____ give more work on the same level.