My uncle from Hongkong has changed so much that I could hardly ________ him at the airport. 

 I had hoped to get to the meeting, but I found at the last minute that I couldn’t ________ it. 

Tom’s father had not spoken to him since his marriage, because he considered Tom ______ a mistake in marrying so young a girl.

 Elephants would ______ if men were allowed to shoot as many as they wished. 

The two friends _____ on the Internet for three hours, and they would go on till the next morning.