Although the causes of cancer ____, we do not yet have any practical way to prevent it.
A. are being uncovered B. have been uncovering
C. are uncovering D. have uncovered
____ team wins on Saturday will go through to the national championships.
A. No matter what B. No matter which C Whatever D. whichever
We’re just trying to reach a point ____ both sides will sit down together and talk.
A. where B. that C. when D. which
Someone who lacks staying power and perseverance is unlikely to ___ a good researcher.
A. make B. turn C. get D. grow
I’d appreciate ____ if you would like to teach me how to use the computer.
A. that B. it C. this D. you
Engines are to machines ____ hearts are to animals.
A. as B. that C. what D. which
