Do you know _______? I’m going to see him. — Sorry，I don’t know．

Tom didn’t go to the park ________ the heavy rain.[ ]

_______ I take my umbrella with me? – _______ better to do so. The weather is changeable.

Mr. Black, I find ______ difficult to play the piano well.—Oh, I think you just need to practice more

Do you know _____ old lady in blue?－Yes, she is a teacher of _______ university in Beijing.