2013高考英语一轮总复习优化课时作业及答案：新人教版必修2 Unit 4
Unit 4 Wildlife protection
Ⅰ.单项填空
1．I really appreciate ________ to relax with you on this nice island.
A．to have had time B．having time
C．to have time D．to having time
2．If we don’t take steps，the Tibetan antelopes and pandas will ________some day just as dinosaurs，which is terrible.
