Lesson 21 orange book pp. 135-137

Small sailboats can easily capsize___________ they are not handled carefully.

• but

• which

• if

• so

___________ they are tropical birds, parrots can live in temperate or even cold climates.

• Despite

• Even though

• Nevertheless

• But

_____________added to a liquid, antifreeze lowers the freezing temperature of that liquid.

• That

• As is

• It is

• When

__________ advertising is so widespread in the United States, it has an enormous effect on American life.

• Why

• The reason

• On account of

• Since

__________ towards shore, its shape is changed by its collision with the shallow sea bottom.

• During a wave rolls

• As a wave rolls

• A wave rolls

• A wave's rolling

__________ are increasingly linked over long distances by electronic communications, but many of them still prefer face-to-face encounters.

• Although people

• Despite people

• Today people

• The fact that people

_______________ together in one place, they form a community.

• When people who live

• When people living

• Whenever people live

• Whenever living people

_________ managed by an independent governor and board of directors, the Bank of Canada is owned by the Canadian government.

• And yet

• In spite of it

• Although

• It is

_________ pieces of rope are of different thickness, the weaver's knot can be used to join them.

• Two of

• What two

• Two such

• If two

___________ the seeds of the Kentucky coffee plant are poisonous.

• Until they have been cooked

• Cooking them

• They have been cooked

• Cooked until