Generally speaking, the __________ specifies whether a certain tagmeme is NOT in the position of the Nucleus or of the Margin in the structure

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

Travellers, when ____________ the checks, have to sign the checks in the presence of the bank or service clerks

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

Dreams are often an elegant means of highlighting problems ______ in the present or the past.

The visitors felt greatly surprised at _____ they saw in the museum.

The visitors felt greatly surprised at ______ they saw in the museum.

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

_____ contrast, they saw in the preceding hundred years from 1650 to 1750, when England was still a completely agricultural country.

The British Empire was replaced by the British Commonwealth or the Commonwealth of Nations in_____.

______no air or water, there would be no life in the world.

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