What do you think is the most _____ time to find him at home?

Some children are too ________ about their food, which is bad for their growth.

The shy girl felt ______ and uncomfortable when she could not answer her teacher’s questions. 

Can you tell me the        difference between the words “require” and “request” ? I sometimes get puzzled by their meanings.

I'm interested in a one-bed room． Do you have any _____?