There is ’s’ and ’u’ in the word’ understand!
| A．a; a | B．an; a |
| C．a; an | D．an; an |
Tom Green ________ his parents every night even while he was traveling around China.
| A．called | B．is calling |
| C．will call | D．calls |
________ delicious the mooncakes are!
| A．What | B．How | C．What a | D．How a |
You should talk to your parents and you will get help ________ you have a problem.
| A．unless | B．if | C．until | D．so |
Tom said sorry to Kate because he took her umbralla ________.
| A．by accident | B．for accident |
| C．by mistake | D．for mistake |
________ should not be asked to study at night on weekends.
| A．Sixteen years old | B．Sixteen year olds |
| C．Sixteen-year-old | D．Sixteen-year-olds |