单词拼写（共1小题）
根据句子的意思，用括号中所给汉语提示或英语单词的适当形式填空。在答题卡标有题号的横线上，写出空缺处所填单词的正确形式。（每空一词）
While he loves his students, he is very ______ with them．(严格的)
Some of them agree with you, but I am strongly ______ your project．(对抗，违反)
They now have two weeks to decide ______ to buy the house or not．(是否)
Billy seems to have difficulty _______ the new words．(发音)
She said she had no _______ about her daughter’s health．(担心)
The whole world was surprised at many _______ of China these years．(achieve)
When Karl Marx was in his _______, he began studying English．(fifty)
Reaching the top of the moutain,we were all breathing ________．(heavy)
We are always ________ to speak more English in class．(encourage)
May I introduce Peter, an old friend of ________ to you．(we)