【推荐1】The astronomer focused his telescope _________ the moon.

【推荐2】The talks will focus ________economic development of the area. (用适当的词填空)

【推荐3】Entries should consist of an original piece of writing, ________________ (focus) on the theme of food waste and showing how we can contribute to its reduction. (所给词的适当形式填空)

【推荐1】Such good use has been made_____________ his spare time that his English has improved a lot.

【推荐2】The switch ________ a free market economy will not be easy. (用适当的词填空)

【推荐3】Can we agree ________ a date for the next meeting? （用适当的词填空）