填空题
·You will hear a man inquiring about a new oven cleaner.
1 This new{{U}} {{U}} 1 {{/U}} {{/U}}cleaner is a new product.
2 After the oven is sprayed thoroughly, the door of the oven is closed and you turn the oven on to about{{U}} {{U}} 2 {{/U}} {{/U}}
3 He usually leaves the oven on for{{U}} {{U}} 3 {{/U}} {{/U}}minutes.
4 It does sound much easier than doing it by{{U}} {{U}} 4 {{/U}} {{/U}}