Upon completing an X-ray exposure and turning the equipment off, _____. A: personnel should wait for a few minutes before entering the exposure area. B: personnel should wear a lead-lined apron before entering-the exposure area. C: personnel should enter the exposure area without fear of radiation exposure. D: personnel should take a reading with a survey meter before entering the exposure area.

we are very pleased _______ business relations with your firm. A: to enter B: to enter into C: entering into D: entering

The _______ TOEFL score for entering this program is 600.

All people entering the country will need a valid _____.

Try to （ ） exactly where the smells are entering the room.

The thieves were ____ by the police as they were entering the bank.

A(n) ___________ is a basic program for entering commands and code into a computer.

＿ entering the hall, he found everyone waiting ＿ him.

_ entering the hall, he found everyone waiting _him.

______the jungle did he realize that there was danger everywhere in it. A: Upon entering B: When he entered C: Only after entering D: After he had entered