1. _______ products include food items such as yogurt, cheese and butter.

   A. Natural          B. Non-diary         C. Diary           D. Artificial

2. Luckily, my family was offered another 20% discount when booking rooms at that hotel because it was ______ then. 

   A. high season      B. crowded season        C. low season       D. close season

3. Thanks to the promotion scheme of this travel agency, this abroad trip is _____ to my family.

   A. affordable        B. unaffordable        C. affordance        D. afford

4. If you want to make sure about your stay at the resort, you need to make booking ______ advance.

   A. for               B. with               C. on                D. in