---- Is that pen? ----- No, It is eraser.A. a; a B. a; an C. /;an
— What’s the trouble with you? 一I________ a headache.
Students shouldn’t go to school __________breakfast. It’s bad for their health.
–How does Jack usually go to work? —He ______ drive a car, but now he ______ there to lose weight.
—Why are you so tired these days? —Well, I have ________ homework to do.
___his surprise, she succeeded in climbing up the high mountain.