Do you think exercise can keep us ________？
| A．well | B．good | C．fit | D．fine |
Food supplies in the flood-stricken area _______. We must act immediately before there’s none left.
| A．have run out | B．have been run out | C．are running out | D．are being run out |
He _______ have taken your car by mistake because he didn’t have the keys.
| A．mustn’t | B．shouldn’t | C．couldn’t | D．needn’t |
It is not always easy for the public to see _______ use a new invention can be of to human life.
| A．whose | B．which | C．that | D．what |
He dressed up and went to the party as if ________.
| A．was invited | B．had been invited | C．to be invited | D．invited |
After completing and signing it, please return the form to us in the envelope _______.
| A．provided | B．providing | C．having provided | D．provide |