听力原文：  If you want to invest money at short term, you've got several possibilities: first, a current account. This gives you the possibility of having all your money at your immediate disposal. It also entitles you to a cheque-book. Second, you've got a deposit account, which usually pays about 3. 5% interest, less tax. In that respect, a deposit account's a better investment than a current account. However, though you are entitled to a cheque-book, you can only withdraw up to a certain sum each month. For large amounts, you must give the bank a few months' notice. Finally, you have certificates of deposit. These pay in the order of 6.5% interest.

28. How many possibilities are there for a customer to invest money at short term?

29.With what kind of deposit can a customer NOT use a cheque-book?

30.What is the interest rate for maintaining a deposit account?

(28)