After he retired from office, Roger _________ painting for a while, but soon lost interest．

make up

took up

set up

put up

I realized that I had been transported into the future of _________ was still my hometown!

what

that

which

where

A conclusion _________ the disease will be defeated．

is drew what

was drawn that

is drawn that

was drew that

_________, the boy entered a secret cave．

Worry and curiously

Worried and curious

Worriedly and curiously

Worried and curiously

Who did you _________ to pick up the foreigner at the airport．

arrange

arranged for

arrange for

arranged

With a dinning table already _________, all the guests come and sit down．

laid

laying

to lay

being laid

I found my father _________ in a chair, completely _________ in a magazine．

seated; absorbed

seating; absorbed

sitting; absorbing

sitting; losing

_________ to the sun for a long time will do harm to your skin．

Exposed

Exposing

Being exposed

To be exposed

It remains _________ whether the medicine will work on human body．

seen

to seen

seeing

to be seen

Only when he left home _________ how much he loves his parents．

did he know

had he know

he knew

he had knew