If I............that you couldn't eat octopus I wouldn't have bought it.
A.know
B.knew
C.had known
D.have known

..............in the nuclear power station go wrong, all the surrounding area could be in danger.
A.Something would
B.Something will
C.Should something
D.Something will

What does the author think is the best way for children to learn things?
A.By listening to explanations from skilled people.
B.By copying what other people do.
C.By asking a great many questions.
D.By making mistakes and having them corrected.

The passage suggests that learning to speak and learning to ride a bicycle are _______.
A.basically the same as learning other skills
B.basically different from learning adult skills
C.not really important skills
D.more important than other skills

The word “those” in paragraph 1 refers to ___________.
A.skills
B.people
C.changes
D.things

According to paragraph 1, what basic skills do children learn to do without being taught?
A.Reading, talking and hearing
B.Talking, climbing and whistling
C.Running, walking and playing
D.Talking, running and skiing

The word “essential” in paragraph 3 is closest in meaning to ___________.
A.wonderful
B.important
C.complicated
D.difficult

Black Friday - the day after Thanksgiving is considered _____________.
A.a national holiday
B.falling on Thursdays
C.the start of the holiday season
D.the busiest shopping day of the year

What does the word "they" in paragraph two refer to?
A.people
B.stores
C.shoppers
D.gifts

.............you leave an address- or telephone number, we will not be able to contact you.
A.If
B.Unless
C.If not
D.Whether