() is accepted as wrong is not necessarily wrong.

单项选择题If there are any new words, ()in a dictionary.

A. look them through
B. look them up
C. look them over
D. look them up and down

单项选择题The influenza discovered by a doctor in Singapore is caused by ()

A. a new type of virus
B. type A virus
C. a sub-group of type B virus
D. a virus only existing in Asia