A. Young ducks know how to swim
B. swimming is known by young ducks
C. the knowledge of swimming is in young ducks
D. how to swim is known in young ducks

A. much big
B. too big
C. so big
D. very big

A. A fortress
B. A catapult
C. A large sword
D. A cannon

A. old enough
B. as old enough
C. enough old
D. enough old as

A. that is should be stored for later consumption
B. should be stored for later consumption
C. should it be stored for later consumption
D. it should be stored for later consumption

A. The Son
B. Adam and Eve
C. Computers
D. He creates everything

A. It is generally believed that
B. Generally believed it is
C. Believed generally is
D. That is a generally believed

A. mathematic teachers
B. mathematics teachers
C. mathematics teacher
D. mathematic’s teacher

A. to sell advertising
B. if they should sell advertising
C. selling advertising
D. sold advertising

A. had better to get
B. had to get better
C. had better get
D. had better got