-----_____ do you exercise?
-----Once a week.
| A．How long | B．How often |
| C．How far | D．How soon |
The reserve gives wildlife food and shelter. Which is the correct sentence structure?
| A．S+V+P | B．S+V+IO+DO |
| C．S+V+DO+OC | D．S+V+DO |
Each of us should take action hunters catching bears for their fur. Otherwise, there will be no bears left in the world.
| A．stop | B．to stop |
| C．stopping | D．to stopping |
Father was reading a newspaper, ________ Mum was cooking dinner when I got home yesterday.
| A．when | B．while | C．until | D．as |
90% of the boys in our class __________ playing basketball.
| A．enjoy | B．enjoys | C．enjoying | D．to enjoy |
— I phoned you at six yesterday afternoon, but nobody answered.
— I _______ a walk with my parents near the river.
| A．am taking | B．was taking |
| C．took | D．will take |