21. The ceiling’s low, _____ you need to be careful not to hit your head.
A
so
B
but
C
for
D
or
24. I wonder whether his hearing is okay ______ he has turned the television up very loud.
27. You’d better make the plants shorter, ______ they will interrupt the views from the house.
30. I always check the prices of different brands _____ I make a major purchase.
句意:天花板很低,因此你要当心,别碰着头。so表因果关系。故选A。
连词/连接词
判断结构
抓不住要点
容易