_____ reading may take up too much of your time, it is very helpful in raising your grades efficiently.
| A．Because |
| B．As |
| C．Once |
| D．While |
Almost of the students in the class glasses.
| A．two thirds; wear | B．two thirds; wears |
| C．two third; wear | D．two third; wears |
Have you ever seen snowman ride bicycle? That’s we look like.
| A．what | B．when | C．where | D．how |
Her sister left home in1998, and since.
| A．had not been heard of | B．has not been heard of |
| C．had not heard of | D．has been heard of |
What transport do you prefer .
| A．to use | B．use | C．using | D．uses |
______， a sleepy driver killed twenty－two students and teachers in a traffic accident in Shanxi Province.
| A．What's more | B．After all |
| C．Believe it or not | D．More or less |