下列所有雇员流出形式中属于自然流出的是（）。
A.辞职
B.退休
C.自动离职
D.开除
参考答案：B
用所给词的适当行式填空
1. —________ you ________ (write) one last week.
—Yes, I _____
2. — he ______ (finish) his homework?
—Not yet.
3. —______they ever ______(be) abroad ？
—Yes, just once.
4. Alice’s father ______ just ______ (finish) his work.
5. Mike _____ (finish) his work just now.
6. Last term I_______ (learn) many English words.
国际补偿贸易
