Charlie ______ be really difficult at times even though he’s a nice person in general.

--- I spent two weeks in London last summer. --- Then you must have visited the British Museum during your stay, _______ you?

Keep up a good state of mind even if you ______ fail plenty of times.

 －Are you coming to the English evening?－I’m not sure. I     go to the concert instead.

－ Look! Mrs Green is wearing a black dress today.－ I think she _______ wear red. She looks young in red.