How long is it ________ we last had a picnic together?
Faced with the hard financial ____________, all the countries in the world should learn to cooperate to get it over.
He kept sending her presents in an attempt to win her _______.
I shouldn’t have accepted the man’s present, but I found it difficult to turn down his ______.
—Who did you stay with yesterday? I couldn’t find you anywhere. — ___________.
The Chinese are looking forward to the first _______to land on the moon after three Chinese astronauts’ successful trip to space.