—Mom, can I watch TV?—Yes, but you must do your homework _________ you can watch it. A.befor
—Mom, can I watch TV?
—Yes, but you must do your homework _________ you can watch it. A.before B.after C.because D.or
A
试题分析:句意:--妈妈,我可以看电视吗?--可以,但是你在看电视之前必须先做做作业。A. before在……之前; B. after在……之后; C. because因为; D. or或者。根据句意故选A。