The lady couldn't say a word when she saw the snake, ________? A did she B didn't she C could she D couldn't she
He ________ get into his own house because he has lost his keys.
Caspar ________ his leg when he ________in a football match last week.
Smoking is one of the ______ of heart disease and it kills lots of people every year.
The time that he ________ in playing computer games each day is about two hours.
The book ________ I bought yesterday is very interesting.