题目

在一杯水中不断加入食盐直到食盐不再溶解为止，此时杯中的食盐溶液处于（） A . 饱和状态 B . 不饱和状态 C . 浑浊状态 答案：A 完型填空 　　Once a rich woman invited Martin Brown, a famous singer, to sing for her friends．But she 　　1　　 him to have dinner with them．She told him to eat 　　2　　 the servants(佣人)． 　　After the meal Martin stood up and said to the servants, “ Now, my good friends, I 　　3　　 for you．” He sang several songs and the servants were quite 　　4　　． 　　Then the rich woman asked 　　5　　 to come to the sitting-room．“ We are waiting for your songs．　　6　　 you ready?” the woman asked． 　　“ I am sorry, ” Martin said．“I have sung 　　7　　．I usually 　　8　　 once in one evening, and I can’t sing 　　9　　”．And with a polite “　　10　　” he left the rich woman’s house． (1) [　　] A． doesn’t invite B． don’t invite C． didn’t invite D． haven’t invite (2) [　　] A． with B． for C． at D． in (3) [　　] A． sang B． shall sing C． sing D． was singing (4) [　　] A． sad B． bored C． exciting D． pleased (5) [　　] A． the servant B． the friend C． the woman D． the singer (6) [　　] A． Were B． Is C． Are D． Be (7) [　　] A． ever B． already C． never D． yet (8) [　　] A． sings B． will sing C． sing D． sang (9) [　　] A． one B． two C． once D． twice (10) [　　] A． Good night B． Good morning C． Good afternoon D． Good day