--- Isn't that Ann's husband over there?--- No, it ______ be him---I'm sure he doesn't wear glasses.
—Guesswhat!Icameacrossanoldfriendatthepartylastnight. —____________!I’msureyouhadawonderfultime.
______ around the cultural relics for almost an hour, we got together under a big tree for a short break.
---He ought to have been warned of the danger. ---_______, but he wouldn’t listen to me.
---You may find the key to the maths problem on page 107. ---Ah, it’s so simple. I wonder why I ________ of that.
----You seem to have known Dr Smith for a long time. ---- That’s true. ______ he joined our club six years ago.