---- It is generally believed that teaching is __________it is a science.
| A．an art much as | B．much as an art as |
| C．as an art much as | D．as much an art as |
If I were you,I__________ his offer.
| A．would accept | B．accepted |
| C．will accept | D．can accept |
Look at the terrible situation I am in! If only I__________your advice.
| A．follow | B．would follow |
| C．had followed | D．have followed |
—Where is Jack?I can’t find him anywhere.
—He__________ his homework upstairs.
| A．might have done | B．must have done |
| C．must be doing | D．must do |
I don’t know why he is late.
—Nor do I.He__________an accident.
| A．could have had | B．should have had |
| C．might have had | D．must have had |
—My little daughter is coughing worse than ever.
—She__________to the hospital yesterday.
| A．had to be taken | B．should have taken |
| C．must have been taken | D．ought to have been taken |