—We’ll go to the party to be held in Qinghai Grand Theater at 8 tonight. Could you join us?—I’m afraid I can’t. I ________ the holiday plan with my friends.

What a heavy rain! I’m afraid it will last long.– ________ We’re getting into the rainy season now.

David is a ______ musician. He can play the piano very ______ .

Tom’s uncle must be an engineer, ___?

Many people have donated that type of blood, but the blood bank needs ________.