It was Dr. Rontgen who （） X-rays.

单项选择题There is （） information on how to get the cheap fears.

A.few
B.afew
C.little

单项选择题They decided to （） into the cause of the accident.

A.see
B.look
C.watch

单项选择题This is one of the most important things （） all.

A.among
B.in
C.of

单项选择题Tom is a person who always （） up to dangers.

A.meets
B.faces
C.sees

单项选择题He worked in this company （） several years.

A.in
B.since
C.for