I had been working on math for the whole afternoon and the numbersbefore my eyes.
| A． | swim | B． | swum |
| C． | swam | D． | had swum |
My father read through my composition and _________quite a few spelling mistakes in it.
| A．sought | B．issued |
| C．spotted | D．consulted |
It was about 600 years ago _______the first clock with a face and an hour hand was made.
| A．until | B．when |
| C．before | D．that |
If you_______ smoke, please go outside.
| A．can | B．should |
| C．must | D．may |
Every means _________tried but without any result.
| A．have been | B．has been |
| C．are to be | D．is to be |
Do you wake up every morning __________ energetic and ready to start a new day?
| A．feel | B．to feel |
| C．feeling | D．felt |