1、C (知识点:a和the的区别用法)
2、D (知识点:完成时)
3、B (知识点:词组have difficulty in doing sth/ have difficulty to do sth)
4、D (知识点:序数词后的用法)
C (第一个泛指,第二个修饰surprise,用于感叹句)A (过去做的决定) A (固定搭配:had the difficulty in doing )B(被告知)
C
B at once then 立刻完成有将来的意味
A 结构是have difficulty (in) doing sth 不要被an elderly person of no family这个同位语迷惑
D
cbdd
第三题只有D构成了完整的时态
第四题不定时作定语
c, a , b, d