Not having worked out the program, ________ leave the office.
A：so he was forbidden to
B：and he didn;t want to
C：his little son couldn;t make him
D：he couldn't free himself to
56－40=____
74－20=____
98－60=____
- How many months are there in a year? （ ）
- ________________
①豆子和豆秸本是同根生长的，兄弟相残为何那样凶狠急迫！
——《七步诗》，作者曹植
②只要把清白留在人世上，自己就是粉身碎骨也不怕。——《石灰吟》，作者于谦
③竹子紧紧咬定青山毫不放松，这是因为它原来就扎根在岩石的破缝当中。
——《竹石》，作者郑燮
④再看看妻子和儿女们哪还有什么忧愁呢？我胡乱地把诗稿和书籍卷好，高兴得简直要发狂。——《闻官军收河南河北》，作者杜甫
