China has invested 15.2 billion yuan so far this year to support pig keepers, in a(n) _______ to ensure enough pig supplies.
-----When will you leave for Paris for a visit? -----_______next month.
It’s impossible for all the people to get jobs because _______of them are not fit for them.
The black colour of your shoes doesn’t_______ the white colour of your suit.
Mr.Smith was much surprised to find the watch he had had _______was nowhere to be seen.
Only when class began _______that he had left his book at home.