The population of many Chinese cities has_________ doubled in the past 30 years.

Tom studied hard .He wanted to ________ of the good chance to learn .

Some of the tricks people tend to _______ on each other on April 1st should be forbidden.

Are you coming to Alice’s party?—I’m not sure.I _______ go to the concert instead.

下列各组中加线字的意义不全正确的一项是