Shall we have some noodles ________dumplings

Waiter， $20 for dinner， right一I’m afraid $25， sir， for drinks are .

High house prices can be brought undercontrol ________ the government takes some necessary measures

The students are warned not to talk about anything ______ to the accident that happened the other day in the school.

A post office should be built in a central ______ for the sake of the convenience.