1 . Part of the difficulty is that he is so hard to ________ (归类). (根据汉语提示单词拼写)

2 . It suddenly s_______ me that I had left my schoolbag in the dormitory. (根据首字母单词拼写)

3 . Nothing can be_________ than having a cold drink on a hot summer day. (用适当的词填空)

4 . It is strongly ________ (建议) that we should wear facial masks in public places.(根据汉语提示单词拼写)

5 . It is _________(估计) that 50% of the students will fail in the examination this time. (根据汉语提示单词拼写)

6 . It is strongly ________ (建议) that the machines should be checked every year. （根据汉语提示单词拼写）

7 . My hometown, Jilin, is a beautiful old city with many beautiful places worth __________ (探索). (根据汉语提示单词拼写)

8 . It s________(使……突然想到) me that I was cheating myself by pretending to understand what I didn’t.   (根据中英文提示单词拼写)

9 . It is a___________ that China may replace America as the largest economy in 5 years. (根据首字母单词拼写)

10 . It is ________ (估计) that we will call on our former English teacher next weekend. (根据汉语提示单词拼写)