我们不允许在图书馆里大声说话。

We are not ___allowed to speak loudly in the library.

老师允许我们在课间休息时吃零食。

The teacher ___allowed us to eat snacks during the break.

这张优惠券让我能够以半价买到这件衣服。

This coupon ___allowed me to buy the dress at half price.