3 . Avoid close contact with anyone with cold or flu-like symptoms ______ you are infected with the virus.

A．so that

B．now that

C．even if

D．in case

4 . ______ the fact that a lot has been done to provide more services and facilities, the residents still complain about the great difficulty in receiving medical health care.

A．Though

B．While

C．Despite

D．Through

5 . It ______ American James Allison and Japanese Tasuku Honjo who won the 2018 Nobel Prize in Medicine ______ discoveries leading to new approaches in using the immune system to fight cancer.

A．was; whose

B．were; of whom

C．was; for

D．were; whose

6 . Skipping classes, especially big lectures ______ an absence may not be noticed, is common among college   students.

A．whose

B．where

C．which

D．when

7 . The only thing ______ many of the papers pay their attention is the issue of decreasing tax for those low-income families.

A．which

B．that

C．on which

D．to which

9 . Before the 19th century, making clothes was mainly done by unknown dress-makers, ______ design of clothes was influenced by what people were wearing at the French royal court.

A．who

B．whose

C．which

D．when