One of the most important questions they had to consider was__________ of public health
It ______ six years since they last saw each other.
Look at these clouds. ______.
-- Could you give these books to Mr. Mackintosh?-- Certainly, ______ him about something else in any case, so it won't be any bother.
Lu Xun ______ a lot of novels.
A relative of yours ______ this evening.