To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.
| A．put | B．putting |
| C．to put | D．to be putting |
—Look，I’ve bought some bread，including your favorite flavor.
—You ________ any because we still have plenty at home.
| A．should have bought |
| B．could have bought |
| C．needn’t have bought |
| D．mustn’t have bought |
Even students of average intelligence ________ become top students by improving their study habits.
| A．must | B．can |
| C．have to | D．ought to |
—God！My cell phone is missing.
—You ________ have left it at home.I heard you telephone our daughter in the bathroom.
| A．shall | B．must |
| C．would | D．could |
I’m really very busy，otherwise I ________ certainly go there with you.
| A．can | B．shall |
| C．will | D．would |
It is required by the rules that students ________ get grades not lower than 85 in any subject in order to get the scholarship.
| A．will | B．may |
| C．shall | D．would |