We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
Who would you like to have _____to Beijing for business this time?
You can’t imagine that a well-behaved man _______be so rude to a lady.
Some of the tricks people tend to _______ on each other on April 1st should be forbidden.
Lack of money ________ her not continuing her studies.
You can hardly imagine the difficulty the woman had ________ her children.