[课 下 作 业]
Ⅰ.单项填空
1.Some patients experience a slow decline in their health as the effectiveness of the drugs increases ________.
A.by and by B.little by little
C.after all D.all in all
答案 B [by and by不久;little by little逐渐地,缓慢地;after all毕竟;all in all总之。只有B符合句意。]
2.________ by the mudslide,the city was cut off from the outside.