( )1. Beijing has got population of more than 13.8 million.
A. the B. a C. an D. /
( )2. In hot summer, we should pay attention to protecting ourselves _____ strong sunlight.
A. from B. for C. with D. to
( )3. The _____ traffic stopped me from going to school on time yesterday. I was late!
A. heavy B. crowded C. fast D. quick
