问题
did they go to work last week Once .[ ]
A: How many times
B: How often
C: How soon
D: How long
B: How often
C: How soon
D: How long
正确答案是：
同类题型
So little ________ about science that the lecture was my understanding.
You’ve dropped ________ “s” in the word “necessary”.— Oh, ________ letter “s” is doubled.
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
______are you going to stay there? —______a week. [ ]
Cathy, are you going to buy a flat in Shanghai? —You must be joking. I can’t __________ one there.