Mom, when shall we go to Dongying Museum this weekend– Oh, sorry. I’m going to Beijing for a meeting. ___Saturday __ Sunday is OK.

The dictionary as well as the books_____ great use. That is _____ I bought it. [ ]

You can’t understand the meaning ________you read the text.

They use computers to keep the traffic _________ smoothly.

She ________ great importance ________ regular exercise.[ ]