Not until then ________ how important the brakes were.
| A．I realized | B．do I realized |
| C．did I realize | D．I did realize |
—_____.
—It’s nothing to worry about. I never liked it anyway.
| A．I lost my walkman this morning |
| B．I feel awful. I’ve got a cold |
| C．I feel terrible, but I’ve left your tape somewhere |
| D．I’m sorry, but we don’t have that medicine |
—Can those _____ at the back of the classroom hear me?
—No problem.
| A．seat | B．sit | C．seated | D．sat |
Bats are surprisingly long-lived creatures, some _____ a life span of around 20 years.
| A．having | B．had | C．have | D．to have |
—Will you read me a story, Mummy?
—OK. You _____ have one if you go to bed as soon as possible.
| A．might | B．shall | C．could | D．must |
—Tommy is planning to buy a car.
—I know. By next month he _____ enough for a used one.
| A．will have saved | B．saved | C．will save | D．saves |