A small plane crashed into a hillside five miles east of the city, ________ all four people on board.
The Expo site should be _______ from anywhere in the city of Shanghai within 90 minutes by bus, subways and special taxis.
The doctor said jokingly that his own infection of the virus _______ the discovery of a vaccine (疫苗)of the disease.
-- Jimmy had a lot of parties recently.-- Yes, that might ______ why he didn’t do well on the test.
In order to work better in the future, each of us must first of all know our ______ and weaknesses.
31. The engine of the bus was out of order and the bad weather ______ the worries of the passengers.