The agricultural revolution in the nineteenth century involved two things：the invention
A. The need for agricultural advances to help feed a growing population．
B. The development of safer machines demanded by the labor movement．
C. Machinery that contributed to the agricultural revolution．
D. New Jersey as a leader in the agricultural revolution．
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You'll fail in the driving test_________you have more practice．
A. if
B. unless
C. when
D. after
（）
A. Fridy
B. today
C. delay
D. away
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
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