What a pity ______is ________ you didn’t arrive by daylight.

It is uncertain ______ the experiment is worth doing .

______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.

What________him most was her beautiful appearance.

More than 100 students have entered for the competition and_______ gains the most points will be the winner.

Research shows that though students benefit from having parents involved at school, _____ happens at home matters much more.

The price of pork has not been kept under control as expected, and _____ is more surprising is that the price has risen by 15% just in the past few months．

_______ breaks the law should be punished .

____________ jumped into the freezing river to rescue the drowning girl deserved to be praised.

________ song Jay Zhou sings will become popular pretty soon.