第十九节 状语从句
( )1.(2013年孝感，27)—We can't be successful ________ we keep working hard.
—I agree with you.
A．if B．unless C．because D．when
( )2.(2013年丹东，40)—What are you doing tomorrow, Jane?
—I'll go bike riding if it ________.I like riding on rainy days.
A．doesn't rain B．is cloudy C．is snowy D．rains
( )3.(2013年营口，9)If my brother ________ well in his exams, he'll go to Tsinghua University next September.
A．did B．does C．is doing D．will do
