1 . __________is common knowledge that a thorough declutter (清理) is the best way to instantly refresh your home. (用适当的词填空)

2 . ______ took the author four years to finish his last novel, which came to the top of the best-seller list once published. (用适当的词填空)

3 . ________ seems obvious that only in this way can we fight against the virus successfully.(用适当的词填空)

4 . You could not take back a book to the library on the same day you’d taken it out; ________ made no difference to her that you’d read every word in it and needed another to start.

5 . ________ is worthwhile to buy the reference book because it is a great help for your study during this phase. (用适当的词填空)

6 . _______ shocked us to learn that Louis was disabled, after an operation (手术) on his foot. (用适当的词填空)

7 . ________ once hit me that I could live ________ quiet life in the rural area. Therefore, I began to consider ________(move) to a small mountain village. ________ I settled down, I started living like an old fairy. （用适当的词填空）（所给词的适当形式填空）

8 . How much time and money would ________ cost to replace the contents of that little wallet? (用适当的词填空)

9 . In many countries, ________is not unusual for families of different backgrounds to live together in the shared space. （用适当的词填空）

10 . Given these cultural differences, _________ comes as no surprise that Canada has been celebrating Multiculturalism Day since 2002. (用适当的词填空)