1.According to the infromation,the newly-constructed highway is said to be_______.

A.length twenty miles.

B.length about twenty miles

C.about twenty miles long

D.in twenty miles of length

15.The life of a sunfish is short,____ten years.

A.more seldom than

B.more than seldom

C.seldom more than

D.seldom than more

19.X rays are able to pass through objects and thus make _____details that are otherwise impossible to observe.

A.it visible

B.visibly

C.visible

D.they are visible.

1.c

2.c

3.c