--- Do you think we can get there on time?
--- Yes, ____________ the car doesn’t break down.
| A．even if | B．unless | C．until | D．as long as |
I _____ sooner but I didn’t know that they were waiting for me .
| A．had come | B．was coming | C．would come | D．would have come |
Experiments of this kind ___in both the U．S and Europe well before the Second World War．
| A．had conducted | B．have conducted |
| C．have been conducted | D． had been conducted |
The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.
| A．average | B．ordinary | C．common | D．usual |
It is the first time that he ______ here and now it is high time that he ______ around.
| A．come; should be shown | B．has come; was shown |
| C．came; was shown | D．has come; be shown |
—Dad, dad! My head hurts so much. I think I’m dying.
—________, darling! The doctor says you will feel better soon.
| A．That will do | B．There, there | C．Hi, there | D．So long |