—Do you think I should get a good camera ?—Yes , of course ._______, you also need a good map and comfortable shoes.

—________ is this blue shirt?—It’s seven dollars.

—— Hurry up. The bus is coming! —— Oh, no, we mustn’t cross the street ______ the traffic lights are green.

My grandpa is _________ weak ______ look after himself．He needs help．

Last Sunday I went shopping with my mother ________ bought nothing.