____ Chinese are learning English for a better future.
| A．Million |
| B．Millions |
| C．Millions of |
| D．Million of |
—Where ________ Mary have put the empty bottles?
—She ________ them away. They must be somewhere.
| A．can; can't have thrown |
| B．must; needn't |
| C．must; must have thrown |
| D．can; mustn't have thrown |
Some young people these days just ________ go out of their homes to contact the real world.
| A．mustn't | B．won't |
| C．mightn't | D．shouldn't |
—Who ________ be phoning us at this time of night?
—It might be your sister.
| A．might | B．can |
| C．dare | D．must |
—John looks a bit upset. Did you tell him the bad news?
—Yes, but I ________ him after his birthday party.
| A．should have told | B．must have told |
| C．shouldn't have told | D．needn't have told |
Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.
| A．must | B．should |
| C．can | D．would |