—Where have you been? —I got caught in the traffic jam; ______ I’m here just on time.

Food safety is ________ important, so our government spares no efforts to prevent food being polluted.

Do you think shopping online will ______ take the place of shopping in stores?

In my daily life I      ignore work , study , and other activities to check my phone for messages.

Twenty million years ago, Idoho was not the dry place as it is now. ______, it was warm and damp, covered with thick forests.