—How long are you staying?
 —I don’t know. ______.
| A.That’s ok | B.It depends | C.Never mind | D.It doesn’t matter | 
Some people try to knock me down, only me more determined to do better.
| A.to make | B.makes | C.having made | D.made | 
She removed hat she was wearing and tried on _____ black silk one.
| A.a; a | B.the; the | C.the; a | D.a; the | 
Our car broke down suddenly and the heavy rain our helplessness.
| A.made out | B.led to | C.turned out | D.added to | 
—Have you seen Jack recently?
 —No. He for another company now.
| A.is working | B.had worked | C.worked | D.was working | 
We asked both Tonny and Jerry, but could offer any help.
| A.either | B.all | C.none | D.neither |