When do you have __________to help me with my English I am reading the Encyclopaedia Britannica, but it is too difficult for me! –You can come to me ___________!

I found really difficult for me to guess the meaning of the word.

If I find someone who looks like the suspect，my ________ reaction will be to tell the police.[ ]

I would appreciate ______ if you could letme know in advance when the meeting will be held.

Are you free this Sunday— Yes, I am. I have ________ to do.