______ regular exercise is very important, it’s not a good idea to exercise too close to bedtime.
| A．If | B．As | C．Although | D．Unless |
---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 |
Suzy was making a snowman _______ Kitty was standing beside her.
| A．when | B．while | C．until | D．and |
Mr Smith told his sons ____ football in the street.
| A．don’t play | B．not play | C．not to play | D．to play |
Kelly Clarkson is so popular among young people _____ her beautiful voice.
| A．because | B．because of | C．instead | D．instead of |
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 |