(届北京市东城区普通校高三3月联考)He looked around and caught a man __________ his hand into the pocket of a passenger.
The poor young man is ready to accept ________ help he can get.
Mary wrote an article on ________ the team had failed to win the game.
Parents are taught to understand ________ important education is to their children’s future.
I have always been honest and straightforward , and it doesn't matter_______I'm talking to.
We cannot figure out ________ quite a number of insects, birds, and animals are dying out.