Russia's withdrawal of its experts from China did not strangle (压垮) the Chinese people; _____ it stirred up their enthusiasm for greater exertions.
Leaves are found on all kinds of trees, but they differ greatly ________ size and shape.
I have offered to point the house _____a week’s accommodation.
Everything was perfect for the picnic ______ the weather.
Don’t promise anything ______ you are one hundred percent sure.
We’ll have a picnic in the park this Sunday _________ it rains or it’s very cold.