1 . It was the training ________ he had at school ________ made him a good jumper.

A．what; what

B．what; that

C．that; that

D．that; what

2 . The film brought the hours back to me ________ I was taken good care of in that far-away village.

A．when

B．until

C．that

D．where

3 . Polluted air does much harm to us, long-time exposure to________can affect our abilities in two areas: language and mathematics.

A．it

B．that

C．which

D．what

4 . ________has a good knowledge of physics and history is qualified for the position.

A．No matter who

B．Whomever

C．Whoever

D．Those who

5 . After experiments on COVID-19, medical experts conclude that the infected person still has the possibility of survival, ________he or she tests positive twice.

A．as though

B．even if

C．in case

D．so that

6 . A good advertisement, ________ people attach positive meanings, can contribute to the sales of a product.

A．to which

B．of which

C．for which

D．on which