Fill in the blanks with articles where ．
| A．necessary | B．necessarily | C．is necessary | D．it necessary |
He was unable to make such progress, ____.
| A．hard as he tried | B．as hard he tried |
| C．hard he has tried | D．tried hard as he |
No sooner ____ they rushed out into the street.
| A．did they hear the news than | B．did they hear the news when |
| C．had they heard the news than | D．had they heard the news when |
---- David has made great progress recently.
---- ____, and ____.
| A．So he has, so have you | B．So he has, so you have |
| C．So has he, so have you | D．So has he, so you have |
____, he would have passed the exam.
| A．If he were to study | B．If he studied hard |
| C．Had he studied hard | D．Should he study hard |
____ was his kindness that everyone praised him.
| A．It | B．What | C．So | D．Such |