There is __________ “u” and __________ “s” in the word “student”.
| A．a, a | B．a, an |
| C．an, an | D．an, a |
_______ you have problems, you can call me.
| A．Whatever | B．Until | C．Whenever | D．While |
Usually it’s easier to make _______ decision than to take ________ action.
| A．a; a | B．/; an | C．/; / | D．a; / |
--“Oh, no！There isn’t any sugar left.
-- ______. I’ll buy some when I go into town.
| A．Good idea. | B．Not at all. |
| C．Go ahead. | D．Never mind. |
You can’t imagine(想像) how much difficulty he had ___________his bad moods.
| A．to change | B．change |
| C．changing | D．to changing |
Amy was not sure _______________________.
| A．that she should ask for her teacher’s advice |
| B．if she should finish the task before October 15th |
| C．that should she buy a present for her friend |
| D．if should she go through the third gate |