His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽,33)
Many questions ________ at the meeting, but he answered none.
They had a pleasant chat _______ a cup of coffee.
Will you ________ playing basketball?
________ you met the foreigner from Canada?
She is a bit shy and _______ stand up and answer the teacher’s questions.