It is important to ________ the latest research. [ ]

u like working as a waiter—Yes, but I get tired ______ standing thewhole day．

(2013·江苏三校4月阶段考试)The plan put forward at the meeting is________perfect；there’s still much room to improve.

He never works hard. ____________, he failed.

He arrived in Hollywood in 1964,____some time later,he became a foamous actor