John has three sisters. Mary is the________ of the three.
| A．most cleverest | B．more clever | C．cleverest | D．cleverer |
Don't put off till tomorrow ________ you should do today!
| A．what | B．when |
| C．that | D．which |
—Don't you believe me?
—________， I'll believe ________ you say.
| A．No; whatever | B．Yes; no matter what |
| C．No; no matter what | D．Yes; whatever |
The reform has changed the whole nation. It cannot remain ________ it used to be.
| A．what | B．where |
| C．which | D．when |
Evidence has been piled up ________ drinking water after getting up in the morning contributes to one's health.
| A．what | B．which |
| C．if | D．that |
It is usually thought ________ a little child says is truth.
| A．what that | B．that what |
| C．which | D．that |