29．__________ when you are on the bus or bike．

They found the ______bridge when they went across the village.

And they can ______their passports______，making leaving or “escaping” virtually impossible.

Data items are added or deleted from the list only at the top of the______．

—When can I call on you, afternoon or evening?
—________. I’ll be at home all the time.

Only when we hurried to the airport__________the flight was cancelled.

7． The children were ________ when they heard the________ news．

In ______, the only element that can be deleted or removed is the one that was inserted most recently.

（ ）Some students prefer yellow rulers or erasers when they study for exams because yellow is the color of __________.

When adults go to masquerade parties, they wear costumes which make them look like historical or political figures.____

Virginius would feel more or less guilty when he______.

Doctors are often caught in a _____ because they have to decide whether they should tell their patients the truth or not.