The theme park is one of the places ______ people can amuse themselves _____ various amusements without spending too much money [ ]

The rapidly growing birth rate brings about a lot of environment problems, which the government is supposed to take _____

. I supported him in time , otherwise he ______ off the bike .

Remember the first time we met, Jim— Of course I do. You _______ in the library.

It the train pulled into the station he found that his suitcase was gone.