你不知道火车站在哪里，可以问：
A. Where’s the candy store ?
B. Where’s the train station ?
C. Where’s the bus stop ?
Can you find the answer _________ the question?
| A．in | B．on | C．at | D．to |
Do you know the secret _________ good health?
| A．in | B．on | C．at | D．to |
My grandfather takes exercises ________ two hours every day.
| A．with | B．in | C．as | D．for |
________ you have a cold?
| A．Do | B．Are | C．Can | D．Should |
Did you ________ some medicine?
| A．take | B．eat | C．drink | D．have |