—Are you coming to Jeff's party?
—I'm not sure.I ________ go to the concert instead.

—Could I borrow your dictionary?
—Yes，of course you ________.

He ________ your car by mistake because he didn't have the keys.

—The similarities between social networks are striking.
—That ________ come as no surprise，because they are all products of the Internet.

—Hi，Joan.Any idea where Tom is?
—He ________ on the playground.I saw him there playing football just now.

—Guess what？I came first in that contest.
—Great！You ________ a lot during the past two weeks.

—I didn't go to see the doctor yesterday.
—But you ________.

(2013·新課標(biāo)Ⅰ，29)The door________open，no matter how hard she pushed.

(2013·天津，9)No one________ be more generous；he has a heart of gold.

(2013·四川，5)—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report.