问题

If you have trouble pronouncing these words, you can repeat them over and over again ________ you are comfortable with them．

A:unless
B:if
C:until
D:while;

正确答案是：

同类题型

il, thousands of holidaymakers remained abroaddue to the volcanic ash cloud

下列加点词的用法不同其它三项的是：

It is reported that both of _______ two kids were saved out of the river by _______ university student.— True. He was really brave, wasn’t he

I really don’t understand what_______ it ______ to hold beauty contest worldwideIn my opinion, it is a waste of money, time and energy[ ]

Do you think you are ______ enough to fight with a tiger—No. Actually, I am afraid of all animals, even a small ant.