Robert ______ what he wanted but he gave up at t

He tried to solve the problem, but he （quick) ________ gave up.

Our son doesn’t know what to__________ at the university；he can’t make up his mind about h

Mr. White _____ at 8:30 for the meeting, but he didn’t turn up.A、should have arrivedB、s

Mr. White ______ at 8:30 for the meeting but he didn show up.A.should have arrivedB.sho

Mr. White______at 8:30 for the meeting but he didn show up.A.should have arrivedB.shoul

--I wonder why Mr. Brown hasn t showed up at the meeting yet. --I m not sure but he____