The maths problem remained confusing to the boy although _______ over and over.
| A．explaining | B．being explained |
| C．explained | D．having explained |
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 |
The driver was at ____ loss when _____ word came that he was forbidden to drive for speeding．
| A．a, the | B．/, / | C．the, the | D．a, / |