The Forbidden City attracts a ________ stream of visitors every day,especially during national holidays. (2013·福建,25)
In that school, English is compulsory for all students, but French and Russian are ______.
Sometimes proper answers are not far to seek ______ food safety problems.
To get a better grade, you should ______ the notes again before the test.
I ______ through that bitter period without your generous help.
Even the best writers sometimes find themselves _____ for words.