At that time I had no idea ________ I could hand it to him without being seen.

Why didn’t Mr. Smith arrive on time for the meeting?— He must have been ________ on his way here in the traffic jam.

Thanks for your help— Don’t mention it I _______ offered some advice

He decided to _________ the club for old men and play chess there.

The actor still remembers the excitement in his classwhen a female classmate _____ for a key role in a Zhang Yimou film．