You should turn the lights when we leave the room .A. on B. to C. off
( )(7) ____ will buy one in a shop . A. We B. Us C. Our
( )(6) That is ______ apple . A. a B. an C. none
( )(5) I can ____ it . A. do B. does C. doing
( )(4) It is ____ watermelon . A. an B. a C. none
( )(3) I’ll buy one ____ you . A. to B. of C. for