单项填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. Everywhere man has cut down ________ forests in order to grow crops, or to use
________ wood as fuel or as building material.
A. the; the B. the ; / C. / ; the D. / ; /
22. They had a pleasant chat ________ a cup of tea.
A. for B. with C. over D. during
23. Every _______ ambulance was rushed to the scene of the accident.
A. accessible B. available C. adaptable D. acceptable
