Dogs have a very good __________ of smell and are often used to search for survivors in an earthquake.
He got run over by _____ taxi and now he is still in ____ danger in hospital.
I can’t _____ his failure.It is unbelievable.
—Who left the door open? — Oh, sorry. I _____ the door.
The traffic problems we are looking forward to ______ solved should have attracted the government’s attention.
He seemed to be looking for the words ____ he could express his idea.