题目内容
用适当的介词填空
At that time life was not known ________ scientists.
A festival is often ________ memory of a famous person.
Fill in the blanks with the proper propositions.
(用适当的介词填空。)
We’re collecting information ________ the Chinese festivals ________ a group ________ visiting foreign students.
A new opera will be ________ ________ the crown theatre tomorrow.