.-- Who can reach the book on the top shelf?
-- Jack can. He is ________boy of us all.
| A．taller | B．a tall | C．the tallest | D．much tallest |
Come and see me whenever ___________.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |
Tom raised his handsto say something, but he remained silent in the end.
| A．even if | B．as if | C．so that | D．now that |
Not until the early years of the 19th century ________ what heat was.
| A．man did know | B．did man knew |
| C．didn't man know | D．did man know |
_______ in a friendly way, their quarrel came to an end.
| A．Being settled | B．Settled | C．Settling | D．Having settled |
I sight of an empty seat at the back of the bus and went directly there.
A. lost B caught C. looked D. took