1. When you’re learning to drive, _____ a good teacher makes a big difference.
A. have B. having C. and have D. and having
2. Anyone ______ bags, boxes, or whatever, was stopped by the police.
A. seen carry B. seen carrying C. saw to carry D. saw carrying
3. Any student _____ will be disqualified from the exam.
A. catching cheating B. catching to cheat C. caught cheating D. caught to cheat
4. To test eggs, _____ them in a bowl of water: if they float they’re bad, if they sink they’re good.
A. put B. putting C. to put D. to be putting
