— ______ late for school again , Tom ! —Sorry, I ______ .
A:Don't ; won't
B:Don't be; won't
C:Don't be; don't
D:Don't; will
——Do you like math?
——Yes, it's difficult _________ interesting.
修改病句。
①这本书对小明很感兴趣。
②班里开会通过并讨论了他的建议。
① 12+1 = 2−1(2+1)(2−1) = 2 ﹣1;
② 13+2 = 3−2(3+2)(3−2) = 3−2 ;
③ 14+3 = 4−3(4+3)(4−3) = 4 ﹣ 3 ;…
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