4. The boy wanted to ride his bicycle in the street, but his mother told him ______.
A. not to B. not to do C. not do it D. do not to
为什么这里选A而不选B?
not to do为什么在这不行?
8. They would not allow him ________ across the enemy line.
A. to risk going B. risking to go C. for risk to go D. risk going
一般这种题类似risk的词的位置应该放哪里?
10. They knew her very well. They had seen her _______ up from childhood.
A. grow B. grew C. was growing D. to grow
这里为什么不选D?选A的话不是已经有一个had是动词了吗?grow不是动词吗?两个动词?
参考资料:英语牛人团