While _______ driver’s licenses in China, new car drivers will have to fill out a body part donation form, which is _______ for some drivers-to-be.
--Is Jack still in hospital? --Yes. He _________ the bad food.
_________ her son outside the school gate, she drove straight to her work place.
The ship will go faster if we sail _________ the wind.
The president is planning to increase the number of the students _________ to the university next year.
--Is your dad at home? --No, he_________ out.