He's unlucky, and he's always suffering____________ luck one after another.
Now an increasing number of middle school students go abroad for further study at their own ________, trying hard to realize their dreams.
Darwin counted 225 flowering plants, ________ he collected and brought home 193.
When somewhat better ________ academically, he returned home to continue his research.
This new teaching approach is specially ______ to develop children’s problem-solving skills.
The opening ceremony of Beijing 2008 Olympics is a great success, which is believed ________ the Chinese splendid civilization.