My best friend has trouble with his science and he is worried at the moment.
| A．now | B．at times |
| C．in a minute | D．usually |
_________ does Jim surf the Internet? Once a week.
| A．How much | B．How many |
| C．How often | D．How soon |
_______he is busy, ________he helps us often.
| A．Though, / | B．Though, but |
| C．But, though | D．/ , / |
Your child is only five. Is _____necessary for you to be so strict with him?
| A．this | B．it | C．one | D．That |
My mother always has__________ housework to do on weekends.
| A．too many | B．many too |
| C．too much | D．much too |
It’s important ______us to learn English well.
| A．of | B．in | C．for | D．With |