When you sit with your face towards the window, ________．
A. your shadow falls on your book
B. your book is in a shadow
C. the light is still dark
D. the light is on your page
——ho do you-think has made my room so dirty, Mom？ ——It_________be your younger brother.
A. must
B. shall
C. will
D. would
A.to-exciteB.to encourageC.to pleaseD.to respect
A. to-excite
B. to encourage
C. to please
D. to respect
A.matters B.eventsC.incidentsD.accidents
A. matters
B. events
C. incidents
D. accidents
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