The president stood by a window inside the room, ____, looking over the square.
| A．where I entered | B．into which I entered |
| C．which I entered | D．that I entered |
At least 200,000 people were reported ______ in the ever recorded worst earthquake that struck Haiti that winter.
| A．being killed | B．to be killed |
| C．killing | D．to have been killed |
One advantage of eating a balanced breakfast is ______ it can keep you energetic throughout the day.
| A．that | B．how | C．when | D．whether |
We often talk a great deal about English language teaching, ______ that it is the learning that really matters.
| A．having forgotten | B．forgotten | C．forgetting | D．to have forgotten |
Many companies give away small quantities of their produce as samples ______ people can try them before buying them.
| A．if | B．because | C．so that | D．since |
In the rainforest of the Amazon, 50 to 150 plant species ______ every day.
| A．are being destroyed | B．are destroying |
| C．have been destroyed | D．destroyed |