_____more time, he’ll make a first-class tennis player.

A. to do

B. to

C. doing

D doing to

A . an underground lake was discovered

B. there was an underground lake discovered

C. a lake was discovered underground

D. the workers discovered an underground lake

A. teaching

B. teach

C. who teaches

D. who teaching

A. Get

B Getting

C To get

D. To be going

A. to be chosen

B. to choose from

C. to choose

D. for choosing

A.told

B. telling

C . to tell

D. to have told

A. to have studied

B. to study

C. to be study

D to have been studying

A. only to realize

B. realizing

C. having been realized

D. realized

A. to never

B never to be broken

C. never to have broken

D. never to be breaking

A. being badly treated

B. treating badly

C. to be treated badly

D. to have been badly treated