You can not imagine the difficulty they had ____ the problem. It isn’t ____ easy.
| A．to solve; so | B．solved; so | C．solving; that | D．solved; that |
—Dane hasn't arrived yet
—____? To my knowledge, he is a punctual person．
| A．How come | B．So what | C．What if | D．Why not |
Even today I still remember the great fun we had____games on the beach on those happy days．
| A．play | B．to play | C．playing | D．played |
____quite recently, most mothers in Britain did not take paid work outside the home．
| A．Before | B．Until | C．From | D．Since |
____that tears came to her eyes．
| A．She was so deep moved | B．She was so moved deeply |
| C．So deeply was she moved | D．So deeply she was moved |
It's the fact _____ he doesn't know his own birthday surprises us all．
| A．which, which | B．which, that |
| C．that, that | D．that, which |