1．Mother reserved her complaint about my m______ room until my friend left.
2．At first he insisted on a________of his account, however, he agreed with what I said.
3．My father instructed me how to s________ a knife.
4．It is not polite to i________when someone is talking.
5．All countries，________of(不管) their size，strength and wealth，should have an equal right to security.
6．They did not，as we tend to ________(假设)，learn everything by rote(死记硬背)．
【答案】1. messy 2. accuracy 3. sharpen 4. interrupt 5．regardless 6. assume
