_____________ worries me the way he keeps changing his mind.
| A．This | B．That | C．What | D．It |
---Do you know Jim quarreled with his brother?
--- I don’t know, ______.
A . nor don’t I careB nor do I care
C. I don’t care neitherD. I don’t care also
Not until I began to work ______how much time I had wasted.
| A．didn’t I realize | B．did I realize | C．I didn’t realize | D．I realized |
Not until the early years of the 19th century______ what heat is.
| A．man did know | B．man knew | C．didn’t man know | D．did man know |
_____ he realized it was too late to return home.
| A．No sooner it grew dark than | B．Hardly did it grow dark when |
| C．It was not until dark that | D．It was until dark that |
So little _____ agree on the plan that they could not settle their difference.
| A．did they | B．do they | C．they did | D．they did not |