The League Secretary and monitor ______giving a speech while the rest of the class ________ listening attentively.
As reliable parents, they never ______ to give their son what he is promised.
---Must I go to the gym three times a week? ---No, you ______. Twice a week is OK.
---Mary’s skirt is a real bargain. ---_____ must be in a secondhand shop that she bought it.
I wasn’t aware of this before, but recent research _____ that eating too much fat can contribute to heart disease.
The volunteers will do _______ to help those injured in the earthquake.