—Jack, this is the third time that you have been late this week.
—Sorry, sir, but I was help ________ for 15 minutes on the way here in the traffic jam.
We are now enjoying the cool air in the room. ________ the meantime, the farmers are harvesting crops in the hot sun.
—Do you work in this office?
—No, as a clerk in this office is on vacation, I'm just helping______ here for about a week.
The boss refused to sell the car for ________ he thought was not satisfactory.
I have urged Tony ________(stay) away from computer games before he becomes addicted to them.
A survey of China's citizens found that some smokers are unwilling to kick the habit because they aren't fully aware ________ the harm it does to health.
