Emergency line operators must always ______ calm.
| A．grow |
| B．stay |
| C．appear |
| D．become |
He didn’t explain _______ why he was late, which made us unhappy.
| A．of us | B．us | C．for us | D．to us |
Don’t spoil (惯坏) the child. Can’t you make your little son ______ himself?
| A．behave | B．believe | C．perform | D．conduct |
It is well known that Madam Curie won two Nobel Prizes for her scientific ______.
| A．adventures | B．inspiration | C．achievements | D．discoveries |
—Would you like to watch the basketball match with me this evening?
—______. I like basketball very much.
| A．I’d love to | B．Not really |
| C．I wouldn’t go | D．Thank you all the same |
Missing the train means _____ for another two hours.
| A．to wait | B．waiting | C．having waited | D．waits |