When people cut down big trees, new trees should be planted. ,they will have no trees to cut down in the future.
| A．If not | B．If so | C．If no so | D．If don’t |
The crowd cheered wildly at the sight of Liu Xiang, who was reported ____ the world record in the 110-meter hurdle race.
| A．breaking | B．having broken |
| C．to have broken | D．to break |
It was many years ____ American women were given the rights to vote.
| A．when | B．since | C．before | D．as |
_____ is certain is ______ the mystery of Stonehenge has never been fully explained.
| A．It, that | B．What, what |
| C．It, what | D．What, that |
Little Tom admitted _____ in the examination, _____ that he wouldn’t do that in future.
| A．to cheat; to promise | B．cheating; promise |
| C．having cheated; promising | D．to have cheated; promised |
The teacher is much kinder to Tom , _____, certainly, makes the others very angry.
| A．who | B．which | C．that | D．what |