People along the river didn’t allow them to ______ a factory so as not to pollute the water.

Let’s ____ these children, OK

. —-______are they staying in Beijing—-For three days.

This morning your mobile phone was alwaysbusy. I couldn’t ________ to you until several attempts.—Oh, I’m sorry. I was discussing the priceof our products with a client over the phone.

Mr. White ___________ at 8:30 am for the meeting, but he didn’t show up.