I just pretended nobody was at home，so I didn’t ask who ________ was.
| A．he | B．that |
| C．she | D．it |
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 |
— This is a good place for a picnic.
— Yes, it couldn't be ____ .
| A．better | B．best | C．worse | D．worst |