--- Shall we go out for a walk?--- Sorry. This is not the right ____ to invite me. I am too tired to walk.
In the cross-lake swimming race, a boat will be ____in case of an emergency.
The teacher has a peculiar way of ______her student’s nervousness when then speak English.
It was already past midnight and only three young men ______in the house.
Modern plastics can ______very high and very low temperatures.
The company is atarting a new advertising campaign to ______new custumers to its stores.